I'm doing mine the old way with nails, glue and a square, it's working well but I'm only doing 200 frames in batches of 10 a day.
The next 200 will be done with a stapler and jig lol, although the only jig I've seen for sale here is $185 dollars, it does look good though.
I bought a cheap wiring board (all metal imported) it's very rustic but gets the job done well, I'll probably try and sell it on and spend the extra $20 on one made here, they look much better.