According to references, the Finnish B235 was a de-navalized F2A-1, with tailhook, life raft, catapault hook removed, and had a Wright 1820G-5 Cyclone engine with 950hp. It was armed with (1) .30 and (1) .50 caliber in the cowl, and (2) .50 cal. in the wings. The Finns added an armored headrest and seat, and a reflector gun sight. That appears to be the extent of any mods made.
I'll get the decals off to you this week - no exchange required.