Originally Posted by sovende

To me, it looks like you've pretty much maxed out (and then some &#128556 the modifications to make that bike frame fit your human frame. As mentioned in another reply, it appears the the quil is very close to not meeting its minimum insertion depth. The exposed length provides a fair amount of leverage that (as also mentioned) could result in component damage. Even with a quil extender, the leverage is still there and perhaps enhanced. Similar thinking might be an issue with the seat post, although I realize that newer frame geometry makes long seat posts commonplace.
Again to me (yes, some think otherwise), that frame is too small for you! You didn't mention what the "mechanical" issues were with your "old" bike. Nor did you mention if you still had it. Perhaps if you still had the old bike, (and the frame wasn't the source of its problems) you could piece together a "Frankenbike" using the best parts of each 🤔.