This video is by Matt Jackson from Next Level Carpentry.
Matt shows how to upscale an existing trim profile into complimentary casing pieces using basic shop tools rather than custom moulder knives, producing a professional painted finish that fits tight to a door jamb and adjacent wall.
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Design
Instead of replicating the original profile at exact size, Matt scales the proportions to create visually compatible side pieces and a headpiece, keeping the design language consistent while increasing presence at the entry.
He opts for a two-piece strategy—one face piece and a separate lug—to capture both the sharp inside corner and the eased exterior edges without expensive custom tooling.
Lumber Prep
Matt emphasizes careful milling: jointing a reference edge, ripping to rough width, flattening one face, and planing to consistent thickness so all parts fit predictably during final assembly.
He also makes practice blanks from scrap to verify proportions and setups, which simplifies adjustments and reduces wasted material during the shaping stages.
Joinery and Rabbets
To reproduce the tight corner and the backout profile that helps the casing seat against uneven jambs and walls, Matt cuts a shallow rabbet in the lug pieces and a matching rabbet in the face pieces so they index and lock together at glue-up.
Small rabbets are made at the table saw while wider backout rabbets are plowed on a joiner using the rabbiting ledge, with careful test cuts and single-pass planning to ensure clean, consistent shoulders.
Clamping and Glue-up
The rabbeted joint both indexes and resists shifting, so glue-up is straightforward and predictable; Matt uses a fast-setting wood glue for its quick grab to keep assembly moving.
He cleans squeeze-out with dry sawdust and a sharp putty knife rather than wet rags, which preserves the grain and avoids pushing glue into the wood pores, producing a seamless seam after sanding and paint prep.
Shaping and Edge Work
Exterior corners are eased with small roundover bits in a palm router to match the original profile’s soft edges while preserving the sharp inside corner created by the two-piece assembly.
Sanding is done before final glue-up when possible, using a moderate grit on faces and screen on edges to remove mill marks quickly and reduce handwork after assembly.
Returns and Finishing Touches
To finish the headpiece, returns are cut from the same profile and glued on with a combination of CA glue and accelerator plus tape for quick, precise alignment on the miter points.
This approach yields crisp mitered returns that sit flat against the wall and look intentional once primed and painted, avoiding bulky or unfinished end treatments.
Lessons and Adaptations
Matt’s process demonstrates a practical way to get custom-looking millwork for short runs without investing in custom moulder knives, making the technique approachable for small contractors and advanced hobbyists alike.
The workflow highlights two repeatable principles—use of scale drawings and test blanks, and sequencing tasks (shape, sand, then glue)—that can be adapted for different profiles and materials.
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Matt’s Take
These are my personal thoughts and tips based on my own experience in the shop. This section is not written, reviewed, or endorsed by the original creator of this project.
The two-piece approach here is really clever for achieving that sharp inside corner without needing specialty tooling. When you’re working with painted trim, those rabbeted joints are your friend — they practically align themselves and create a mechanical lock that’s stronger than just edge-gluing. Plus, any minor gaps disappear under primer and paint.
That tip about cleaning glue squeeze-out with dry sawdust instead of a wet rag is gold. I’ve seen too many projects where water from cleanup raised the grain or drove glue deeper into the wood pores, creating a mess that shows through the finish. The sawdust acts like a sponge and gives you way more control over the cleanup process.
The CA glue and accelerator combo for those returns is a time-saver when you’re working solo. Just remember that CA glue sets fast — sometimes faster than you expect — so have everything positioned before you squeeze the bottle. And always keep some debonder handy in case things don’t go as planned. Those mitered returns really do make the difference between trim that looks custom-made versus something that just… ends.