I did order some 150s , I have some extra 110 springs that I think will fit and I can make them 155.
I could have just flat out bought some 155s,, but I enjoy working on traps.
I’ve never targeted mink on purpose… always caught em as incidentals.
But I’m going to try to understand them a bit better and try for them on purpose.

The 2" by 4"s in my house are true 2' by 4"s made of oak.

Keith

At first I was simply going to ignore your insult.
But I’ll address it..

I worked for 15 years as a drywall hanger, finisher and painter.. I’ve also paid my dues pouring and finishing concrete… helped my grandfather who was an appliance repair technician and got pretty good at working on older appliances ( before the digital crap)I do know simple electrical wiring ( I will NOT wire anything that I can’t shut off.
Admittedly there’s a few things I’m not familiar with,, that’s why I at least don’t attempt to hide behind something I try to dumb my way through it. That’s why I ask for help.even if I don’t understand something… I try.

NOBODY was born knowing everything ( except for JESUS CHRIST).

I’m all for a good ribbing,, and I’ve absolutely had my fair share of it,,, but this was a straight up insult…
Yes,, I have worked ALOT with my hands.

It wasn't as insult, it was an observation
Sorry I didn't put an emoji at the end

Some people get all emotional about words on the interweb

I’ve been noticing for a few years that the wider stuff is shrinking even more widthwise. Some 2 x 12s are only 11 1/8” anymore, same with 2 x 10’s, 7/8” shy.

And they can vary by up to a quarter inch. That kind of sucks when you’re using them for floor joists.

To OP, use dimension lumber for the top and bottom, and 3/8 plywood for the sides. That gives you most flexibility to get to the size you want. Screws will go thru and hold plywood sides in place when the screw threads bury into the solid dimension lumber. Slots for springs are easier to cut in the plywood. If dimension lumber is wider than you want, rip it down to size.

BTW, all BG traps.....even within a size range.......120's, 160's, 220's, etc. are not all the same size. Some are square and some are rectangles. Springs eyes are different sizes. You need to fit the box to the trap you are going to use.

I do have some scraps of 3/4 that I’ll probably use… just don’t like using plywood because past experience has had squirrels finding it and chewing the daylights out of it.

As far as the body grips being diffident… you are correct… I’m not sure what 110s I’ve got, because some have the identity thats on the dog are very difficult to read.. I do know that some are old style victors. Others have different size eyes on the springs,,, I guess I could sandpaper down to see what they are.