several questions, so seperated out answers:-
* I have a focus with FSA Vero compact bars – which I much prefer to my Specialized ‘anatomic’ (multi bend) bars on the tricross. Planet x do the Strada shallow drop, which is a similar shape to the Vero. I have a set of the PX too, to replace the spesh ones. I feel way more confident on the drops – hand planted in the curve feels more solid than on the anatomics.
* OS bars wont be any different in diameter to standard bars where you hold onto – the OS bit is only at the clamp area, then tapers quickly before the tape starts. You can get some bars with an oval or more flat section on the tops, but you pay for it.
* You can get thicker tape – stuff with ‘gel’ in the name is usually a bit thicker. Decathlon do a cheap gel tape which is pretty good, if there’s one near you.