yeah cross trainning at camp is nice that way you have a competent back up
I do 100 QB/Kicker also
50 during camp/preseason and i play my full grown starters 1/2/2/0 quarters during games
Regular season i go 60 or 65 depending on the depth at the position
Playoffs i go up to 70 (never made the playoffs yet so idk)

just checking, so you play him each season at a different position?

At each camp/preseason you change his position then maybe play him a few games during the season if he is needed
For example i have a depth WR cross trained at RB... when one of my RBs is down i moved him to RB for the time... his overall are around the same range at RB
I have OL that can play multiple position like RG/RT or DE that can play L or R... LB that can play SLB/MLB or MLB/SS... most of my DBs can play at least one of the safety position

When i sign free agents i'm always looking at cross trained players...