Grip form

I've been suffering from sharp pain on the right hand thumb finger as long as 2 months. An important tube pentode 6BM8 was destroyed by my mistake mainly caused by painful and uncontrollable thumb finger. Relatively heavy weight low frequency amplifier was slipped down only few centimeter causing a delicate tube destruction, it's a most miserable affair these days, I don't recognize it was caused by age, never, just because of sharp thumb finger pain only at specific angle? Longer period of time was not required to seek out the reason of consistently lasting pain, too small designed grip of SONY Alpha 9 was the criminal. As a proof, I feel some uncomfortable pain only around the base of thumb finger whenever I hold it with over 500 gr zoom lens together. Careful investigation on the shape of the grip, in manual focusing situation with rotating focusing ring that is positioned anteriorly frontal portion requires to be supported all the weight lens & camera body together around 1 kg only on the right thumb finger, no cooperations with other residual 4 fingers. And this unacceptable phenomena should be caused by too small finger grip design of the Body. Canon EOS 7D does not have this kind of inconvenience at all, of course the grip shape designing ara completely different each other. As a matter for my surprise, a primitive experimental trial to put 3 pieces of wood chop stick could solve the nervous problem thoroughly, how come? Closing the convex shape for middle finger makes it possible to move the gripping position of residual 3 fingers except middle finger upward about 8 mm and the gripping by little finger should be acquired firmly that had been lost with it's original gripping shape. The frontal gripping surface that is newly formed by small wooden parts with 4 mm moving anteriorly takes effect unintentionally. Lateral width of them suits well the sizes of the length between the first joint and 2nd joint of 3 fingers leading to continuous fixed and tight folding by 3 fingers. Needless to say that, sharp pain when I hold SONY camera body disappeared at all after this modification. Suppose LEICA SL 2 model, the concave engraving for middle finger is not necessary for camera gripping though our domestic manufacturers are determining as a fixt idea, especially, SONY Alpha body design lacs vertical height too small, especially inconvenient foreigners with larger palm shape. Closing sensor window for remote controlling does not matter because I never use the function but Wi-Fi connection and touching front dial with upper part to middle finger also the least interference at all. Trifle but indispensable attempt and new favorable findings like these provide me more motivation to proceed in shooting photograph, so happy!