A close estimate would be that after a day or two of head scratching, and pencil sharpening, 98% of them would go into the (mental) WTF was I thinking bin.
---------- There is always that in any kind of "good idea" development.. And the left over parts and pieces will eventually fall into place on another project... Never throw anything away..
It seems too many people get too wrapped up in --- everything has to be --fill in the blank color-- new-- bigger, better, stronger than the lost model posted..... Not for me... I have a hodge podge of brands, no name, used to have a name, but doesn't anymore, home built, bolt this to that and use it, kind of implements.. It works is all that counts.. I like posting about the money I saved and got the job done with a 9/10 wore out --fill in the blank-- which is worth more to me than a whole shed full of bling and sparkle.. My 5 cents of opinion..