Man oh man, been where you are:
http://wellcraftv20.com/community/sh...center+console
All in all good advice you are getting. I would plan to tab in with more than 1 layer of tape. You will find that a layer of 1708 cured out is flexible, around 3 layers you get rid of most of the flex. Your peanut butter should have schopped strand in it as well. Straight resin and cabosil mixed is pretty brittle even though epoxy resin has more flex than polyester.
Make sure before you get started you have lots of acetone, rags, a box of those medical gloves (nitrile/latex) lots of measuring cups and stir sticks
You asked about original glass prep; I used a 4" grinder with 60 grit disks.Scuffed an area about 1' wide the entire length of the stringer, followed by vacuum then wipe down with alcohol. Alcohol evaporates much quicker than acetone. Acetone leaves behind a bit more residue so I wouldn't recommend it for prep work.
When putting in your fillets on your stringers, it works well to put your PB mix in a 1 gal. ziplock bag with the corner cut out to use like a cake decorating bag. Lay the bead and use the end of a spoon give you a nice uniform radius.
Do at least your first layer of tabbing when you do your fillets.
Do not try to do any fiberglass wet-out without a resin roller. I bought several but my favorite by far was my 2.5" length and 3/8 diameter roller, used it almost exclusively.
Also as far as 1708, I liked the 45/45 thread. As far as laying out the glass and wetting out, the direction of the stiching is everything. Stiching running parallel to the bend work much better than perpendicular.