Well ,I finally got mine mounted up. I was going to mount it on the inside of the stringer to hide it, but it woud have been a nightmare plumbing it. I decided to take the easy way out. I hated to mount something else on the transom. It seems that the more stuff you need the less clean the install looks (too cluttered)
If all else fails I can use it for a wheel stop

, it's big enough.
I buttoned it up early this morrning, took it to the lake and 1/3 the way there the bottom of the sky fell out. Crappy weather today. I'll try again tomorrow.