Jim (clampman) .... you are already my hero and I don't even have five posts on this forum yet!
I'll bet you have a basement/garage/woodshop that rivals Norm Abraham's of the New Yankee Workshop. Somehow though, he'd find a way to use a biscuit some glue and a brad on the repair I think.
First up, I don't even know what you are talking about with regard to some of those tools. I have screw drivers, plyers, scrapers, drywall knives, a hammer or two a compound miter saw, a pneumatic finish nailer and compressor, various battery powered drills, small circular saws a nice jig saw and a decent palm sander. I even have a big Milwalkee stainless steel reciprocating sawz-all but that's about my limit when it comes to "tools."
Now, don't get me wrong.... I can do an acceptable job with all kinds of trim molding (this is the second house I've completely replaced and updated all the molding), even crown. I can fill and sand with the best of them, stain and finish like a pro, paint and hang wallpaper with anyone on the planet.... but REAL woodworking? Nope, nadda.... not even close.
This repair is on a jamb that's totally painted. So, what I needed was an idea on what product and possibly technique to use that would both fill a deep" hole as well as the thin mortised area without shrinking and then stand up to being re-chisled without totally cracking should the new mortise fall into the filler (which upon further review looks like it won't).
Fortunately, no grain matching or staining will be involved. So a dutchman (I had to look that one up
) won't be necessary I don't believe. Although, I gotta tell you.... you're way sounds like it's ubber cool and would be a lot of fun for someone who had your tools and skill set. But, that my friend is way, WAY over my head.
Thanks though for the detailed suggestion. I really do appreciate it.