I won't/don't use a 1" twist drill on my 935!
The J-head on the 835 or my 935 will not power downfeed 1" into stainless without trashing the guts of the power downfeed mechanism. 3/8" is what the PM spec lists as max diameter into steel. OTOH, my RF-45 would easily drive 3/4" drill into 316 with it's more robust and advanced power downfeed system (did it many times). And to counter your other assumption, the 833 does have power downfeed and an adjustable limit stop that will disengage automatically, and is much easier to use compared to the J-head - fully documented in the user manual on the PM site. Based on my direct experience with these "baby" knee mills and the original RF-45 from Taiwan, the idea that the knee mill is always more rigid is total fallacy. I can't speak to the 833 specifically because I haven't used one, but the principals that give the RF-45 it's increased rigidity are the same, and fully discussed/documented in my attached revised write-up.1" twist drill into 316 stainless or 17-4ph. I'm even willing to donate material to the both of you if needed.
If I have the requirement of drilling 1" holes (or larger) on a mill, I'm sure not going to buy a 935 or smaller bench mill. That just seems stupid. But, people do what they're gonna do...
bakrch I like the UI on your F/S app better than the FSWizard I use on my iPhone. I get the same results you do, but I like the look of yours better. What app are you using?