I have an EZM1 (ti version). It is a great watch although it came with folded metal endlinks so I always have it on a strap. I’ve looked at the IW3536 a thousand times, but never pulled the trigger. It is an icon. I think both of your divers show much more personality and interest than a Sub or SD.
At the factory they adjust for 5 positions crown up, down, left, right, and dial up (I think). I simply adjust and wear for a day. I am at 4 for 24 hours against an atomic clock. That’s better than the -8 seconds before I started.
Way back in the 90s, Timezone had an online watch making course run by Walt Odets. It came with tools and a movement to disassemble and then reassemble. It did not make me a watchmaker, but I learned enough to make simple adjustments to rate on a movement with index.