Hi Charlie,
Another option is to mount a panel on each side, using a couple SS plates and U-Bolts to attach them to the sides of your pushpit. I did this with (2) 75 watt panels on either side and it's worked out pretty well. I crossed the Atlantic with them and never had to remove them, but could do so fairly easily if necessary. I use a length of PVC fitted inside another length of PVC with holes and a locking pin to adjust the angle of the panels. As Jon and others have noted, keeping them oriented to the sun makes a huge difference in output. As you say, everything is a compromise. But solar panels are great and I wouldn't cruise without them. Good luck with the project, Max (I tried to post a pic but the size is too large, if interested let me know and I could email them)