This is a nice looking roundie! I like how it converts from boring stocker to a nice surf boat!
Few comments on my side that will make the ski a bit better (for almost zero$$).
Get rid of the fuel cock, run fuel lines directly from tank to carbs. You could installa dual pickup or use oem to feed both carbs. Use larger fuel line and a tiny restrictor at the return.
If you do not a have a bpipe yet, you can change the direction of the T piece and allow main stream of water to go outside. This also can be done with the little outlet that goes from head to muffler (t piece and outside)
you can get rid off 1-2 screens in air "filter"
Tank ventilation: make sure you get ridd off oem ventilation and just leave the one way valve with about 5 inches of line at the end of it - no water in tank.
Ski looks very sweet and motoman knows how to turf a lady
Andrew