Wayne I have the SL87. It is my small board given where we live it is not consistently windy.
SL87 gybes nice, competitively fast at 59 wide compared to what guys on much slimmer boards are hitting speed wise (2sec and 5x10) in the same sessions. Feels balanced, never flighty, but also doesn't feel dead, just so settled even when over powered. Straps prepositioned, mast in middle, follow the fin guide and off you go. Fuss free. Have used the following set ups on my CAs:
SL104 (68 wide): 7.9m with 38cm fin and 40cm fin. Handles higher end of sail range nicely. 7.1m with 38 fin (this is the sweet spot set up for me) or even a 36 felt nice when lit up in flat water.
SL87 (59 wide): 7.1m with 36cm fin feels nice at higher end of sail range, but feels super with 6.3m and 34cm fin or even a Vector Delta Speed 27cm when fully lit and flat water.
Boards ride high and dry with less wetted surface than I have been previously used to. Photo credits to PhilSWR, taken at a recent session at Harrys on SL104 with a 7.1m and 38cm fin sailing 90 degrees to wind in flat water. Love this set up. Cheers