There's only a handful who's opinion you should listen to with regards to what you can and can't post (there's a list of moderators here somewhere)
As far as posting.. it would be good to have you here. I've used an Ebony 4x5 with an Aptus MF back and a Betterlight scanning back (neither of which pass the 20sq in rule..) a Horseman SWDII w. a medium format back, none of which were required to be put in a 'small format' thread. There are plenty here who use, as well as would welcome the feedback on your experiences... as well as seeing what you're doing with your work.
(... and there are a lot of Polaroid Type 55 users who are going to be disappointed that they shouldn't be here either.. 4.5 x 3.5" image area... )