Well one must select the type of thumb they have.
Round, tapered, tapered from front to back, tapered from front to back but not on sides. Oval.
If oval...I hate premade ovals...WHy
They sort of have a square corner in the mold of most. I like a feeling of rounded transitions in the oval.
Found two possible solutions lately.
Both with the 10th frame vinyl insert.
The 10th frame vinyl insert is oval at one end or round at the top.
Well their round goes down into the oval and for some reason seems to be SORT of oval. I find I must align oval in the bottom correctly and then I only need about 3 pieceds of tape total to convert their round to an oval feel with all the round blending of corners I need or almost! On a regular round of the same dimension I need like 5 pieces of tape.
For a little more oval feel...I turn the insert off. And cut on a premarked line the top of the oval off.(one is suppossed to only do that if using round end!!!) This makes their insert the right length!
This oval...different from their rectangle feeling oval (if the top part is not clipped and the round is cut off. IS too small...so I went to the next bigger size and repeated procedure and voila. The squarish feeling oval...(also too big) after clipping off oval premarked line...creates a rounded blended oval of just the right size for me. (Now only one piece of tape) Of course proper bevel needs to be applied. We've talked about that before!
I have not tested it and believe I still prefer tape to oval a roundish hole(10th frame) as it does not seem as critical to orient the oval at the perfect angle. Tape allows one to properly orient your thumb oval angle in round! But it's not bad!
REgards,
LUkcylefty
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Open the door...see what's possible...and just walk right on through...that's how easy success feels..