Look at that, is it not nice ? No need to trash $ 2 of mounts when I want update a page. And using Vario as interleave give way more option that simple Glassine
The trick is simple, instead of using expensive glassine, I simply use empty cheap plastic protector, if needed I can slip thing inside later. The protectors cost me 5 cents at Staples
Big advantage for me, is I don't need to include the insane perforations and watermark varieties if I don't like, also a missing stamp don't make a hole.. and I can play the Filling the BB game. win win win
Of course additional Scott binders required .....

