DIY pneumatic bottle capper

Hey!

Together with my study association we are brewing small batches of beer for some time now. We want to scale up because the association exists for 60 years and we want to do a large scale batch. Because of that we also need to step up our game for capping bottles, we currently do it we a handheld home made device but we want to create a pneumatic capper. We want to cap 4 bottles at the same time, has anyone here ever done a home build on such a capper?

Thanks