I have three tools that are "Go To" in my shop. I use these more often than many of my other tools as they are more versatile or easier to use in my model building:
1) I've found this sander to be my most used tool in my shop. It's great for sanding out lightening holes and is better when sanding long straight areas than a vertical belt or disc sander.
https://www.homedepot.com/p/RIDGID-5...4424/202459151

2) I've found this little gem to be great for stripping wood for stringers and gusset blocks, more so than my scroll, band or 10" table saws
https://www.micromark.com/MicroLux-M...op-Hobby-Use_2

3) My last "go to" I've found to work better for me than 123 blocks, which require assembly and can be assembled out of "square"
https://www.micromark.com/SET-OF-THREE-ANGLE-PLATES