The first time I saw the Hills stand I knew it was useless on soft ground. It just got no clever feet for rolling the bike up the stand and no safe parking on softer gound. The 1935 Guzzi was inspiration for the homemade stand for the 1935 Horex 600 4 valves and Honda Clubman, and I will try to do same for the B Raps . The Horex got alu engine plates as well and we start all bikes on center stands all times , no rear stands on any of own bikes. What is wrong on Hills stands too, is the down stops way too close to the pivot so there is extremely high torque and load on stop from bike´s weight and kickstart forces. I´d want 2 " / 5cm minimum stop "lever" on the stand bracket for taking the loads so then alu engine plates are no problem at all. And I´d want two stops on right and left plates certainly for no twisting forces in main stand when sitting on stand !! See the feet shape on the Horex, a decent space parallel to the ground for safe parking on softer ground. The Hills type is heavy for lifting up on stand, no roll-on shape here, plus the bike sits on rear edge of feet, ruining your garage floor. A lot to be desired , I say. So when designing a new stand keep this in mind for fabricating something not second best. I do believe you can find space for better feet on the Vincent, either between silencer and tire or outside close to silencer, like on Guzzi.
Vic
stand stop is the black bracket with hole sitting on alu plate:
roll-on feet with parallel ends for floor:
Honda Clubman mod:
Moto Guzzi GTV 1935 inspired: