Apologies if this is not the right forum! I am making a CNC machined thumb rest for the Ric 4001 4003 that requires no holes or mods to the bass. If you look on Ebay search under Rickenbacker Thumb you will see it. I got the idea after seeing so many Rics with a wear spot in the finish at the corner of the guard, from people digging in their thumbs there. and all the Rics with the bridge pickup cover removed which just looks doggy to me. My 2006 4003 was never as easy to play as I would have liked (being a finger player) and I was loathe to drill holes into it to add a Fender style rest. I made to original out of acrylic scrap with a dremel and a LOT of filing and sanding. Of course if you play your Ric with a pick this is all a big yawn to you
Cool. I have a Tube Ampology Bezel with the thumbrest and its awesome, but its more for the bridge pickup (which is great for me but there are times I want to play over the neck pickup ) This is a good solution.