[Hectic]

You cant mix the w hold with a bridge or flat type hop.
In order to use either a bridge or flat type you need a rubber that has no hump/bump inside aka a smooth rubber.
If you get the baton one it come with a smooth rubber and you can then test it as is or swap the flat nub with a bridge nub (i preffer the bridge nub as it centers the bb in the barrel beter then the flat) or you can get the bridge nub and find the prometheus smooth rubber (echigoya has em thats about the only place i found) ive had good results with the promy smooth and promy bridge combo.
If you go w hold then thats all youll need itll have a nub or you can use the stock nub.
The w hold is beter then stock the baton or smooth rubber with bridge is beter then both in my testing.