Old vs New
Original Marshall metal handle is on the left, Scumback Speakers reproduction on the right.
As you can see the finish is spot on, and the six bolt holes are there, along with the chrome handle.
The new handles vs the Marshall plastic handle.
The new metal handles are sized for a direct fit into cabs from 1971 to present using the plastic Marshall handle. The bolt holes are the exact same size and spacing. You can easily take off your busted plastic handles and bolt these into the same place using machine screws and T-nuts, wood screws or rivets. You could also retrofit your Handwired Marshall, Orange, or Sound City cabs for the proper look with the thicker metal, and knowing you can't bust the corners on these.
Installation will be easy:
All you'll need to do is drill out your existing handle's rivets with a 1/4" drill, and right through the wood of the cab, so no new holes are going into your cab to affect the structural stability, you'll just complete the hole the rivet started at the Marshall factory.
Then you'll use a pair of pliers to press in 10/32 T-nuts in the holes you just drilled the rivets out of from the inside of the cab. Since the old handle will be out, you don't have to take off your back panel at all, since there's a handle hole there already with plenty of room to work with. Channel locks or a hammer will also work to fit in the T-nuts.
Then place the handle over your cab's new handle holes, and screw in the 10/32 machine screws with a drill or philips screwdriver.
That's all there is to it.
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