$10 45o Overbet river

pre depends on his defending range aswell.
Openraising in HU from btn is never terrible , whatever hand you have:)

Flop hits alot of his defening range , which wont fold vs 1 cbet (Kx Tx) so if you cbet this you have to think it as a multiple barrel.

Esp vs this guy who is not foldhappy and this board i'd guess it's not a very good plan to fire multiple barrels , so i'd just ch b.

The overbet on the river is very hard to judge imo
Tbh i'd expect him to lead 2P hands quite often , in order to play them bet-fold .
Problem with this kind of move is i see alot of fish capable of calling Ax here. It's bad , but us not adapting to this and bluffing anyhow is even worse:)

Secondly I wonder if your sizing is optimal.
Betting 520 here needs double the foldequity a 260 bet would achieve ,and I don't believe this to be true