I currently have a Breitling Chrono Evolution with a leather strap on a deployant clasp, and am looking at getting either a new leather strap and/or a pilot bracelet. I have a couple of questions for the experts out there -;

1. I understand that my watch is a 22mm lug size, does this mean that any 22mm strap leather or metal will fit ? Yes to straps, no to metal bracelets. Pretty much any 22mm leather strap will fit, unless it has shaped ends to fit the contour of a specific case. This is quite rare though : most are straight and will therefore fit. This is certainly not the case when it comes to metal bracelets as 99% of them have end links that are designed to fit a specific case only.
2. Often you see the Breitling straps advertised as 22/20, what does this mean ?In that example, the 22 is the width in mm at the watch-end, and the 20 is the width in mm at the clasp end.
3. If I replace the current strap with a pilot bracelet, I have read somewhere that the spring pins are different for the
leather straps and the bracelets ? If so, where could I get different pins ?Yes the pins for metal bracelets are thinner. Any AD will sort you out with the right pins, or go to Breitling direct.
4. Are straps on Breitlings easy enough to change yourself ? Do I need the 'BERGEON 6767-F SPRING BAR FITTING &
REMOVAL TOOL' ?Yes it's dead easy and yes you ideally need a Bergeon 6767-F. There are videos on Youtube showing how to do it.

Thanks.

Thanks again for answers.

Excuse my ignorance, but what/who is AD ?

Thanks.