Looks good David. But, if you rest towards the front on the floating part, won't that put a lot of force on the single screw? ...
Pat - IMO if Dave uses a hanger bar system it would be no different than a fully floated forend on a Bullberry like hanger bar, strength wise, and I never lost one of those even on the badest of the hard recoiling handcannons I had (416 Rigby, 375JDJ's, etc). Besides, its long known the best place to support a TC forend is right under its mounting screw(s), not out on the front tip.
Dave, like the forends Don Bower offered for his Bower rest systems, looks functional but ugly as sin. Just as functional but more pleasing to the eye IMO is cooling slots on a fully floated target forend.