I did this conversion a while ago, the main problem being steering, as there is not much room under the deck for access. Originally I joined both halves of the hull, fitted the steering gear ( using the kit rudders fitted with short shafts from 2mm brass rod) then stuck down the after deck, hoping I never need access again. WRONG!
Latter had to try to cut a hatch which worked, but would have been neater if cut before fitting the deck. Otherwise, no real problems. Two motors salvaged from lidl toys standard hi-tec 2-channel receiver, 2 ACTion mini controllers, one ACTion mini mixer, and powered with four AA cells. Prop shafts from Propshop, propellers from the kit. Steering servo hi-tec featherweight ( the little blue ones).
Unfortunately the motors were not very well matched, so there was a bit of steering problems. In the end I removed the mixer and one ESC and wired the motors in parallel, relying on the rudders only for steering , and that works O.K. Would have been better fitting Orion motors which would have been better matched to each other, but didn't have any on hand at the time.
This is not a very difficult conversion, not a lot of space but it will all go in, and there is plenty displacement to carry the weight. She looks well on the water, and handles well as far as sea state, but makes a lot of leeway in a cross breeze ( but so do most of these small conversions).
Good luck with yours.l