Alaskan mill idea

[flatyre]

Hi folks I have a homemade Alaskan mill I use to make square posts, mantles, and beams, its a basic standard jig on ladders setup. I recently acquired a set of loft ladder which I hope to modify into an extendable runner. That way I don't need to strap a full set of ladders to the roof of the van when milling smaller lengths. At the moment the loft ladders are telescopic and I was wondering if the 'T' shaped track feature could be used in some way on the mill. Having the jig lock into the rails should make the bar less likely to 'wobble' as it travels along the rails, but i'm also wondering if a second jig that holds the saw at 90 degree for doing both vertical cuts first would work?