Tom,
I’ve had my RS 2E since 2008 and use it continuously for furniture making. Since I already put together an assortment with the help of Timmy at Festool Junkie, I will not be a potential customer for your assortment, but here are my views based on having a very wide assortment here to choose from.
I bought some Rubin P50 and have never found a use for it, so your start at P80 makes sense. I also often skip P100.
I like to finish off my sanding with Brilliant 2 regardless which grit I stop at, so I might shift from Rubin to Brilliant sooner than you suggest. The habit I’ve adopted is to have the last two grits be Brilliant 2. Where I can, I quickly duplicate the last Rubin grit with the same grit in Brilliant 2 which seems to get the wood smoother faster.
For white oak that will be fumed, I stop at P220 or P320. For quality furniture wood such as mahogany, walnut and cherry that will be stained with water-based aniline dye I stop at P180.
My current collection duplicates P120 in both Rubin and Brilliant 2, but I now feel that is too coarse a grit for the switch over. The perfect assortment for me, as a hobbyist furniture maker, would be:
Rubin P 80, P 100, P 120, P 150, and Brilliant 2 grits P 150, P 180, P 220, P 240, P 320, P 400.
If you feel you need to get rid of one of these, the three possibilities might be the Rubin P100, Brilliant 2 P150 and P240, but I would prefer to keep the Brilliant P150.
These are just my views and I suppose for every two woodworkers there will be three suggestions as to what sanding schedule to follow.
