I wish to replace the stock Mazda emblems with customs one, but have a few questions that I hope you can help me with.

Can anyone tell me what is the size of the Mazda emblems on the hood and rear?

There is a slight curve on the hood where the emblem is, should I account for this when designing a custom emblem? What angle is it?

PoLak has explained to me that there are two screws that hold the hood emblem, do I really need to take them off, or could I just cover it with a custom emblem?

I worry about wear and tear due to Toronto's 4 seasons, if I did put the custome made emblem on top of the screw will it hold using the 3M Adhesive that most people use?

Who creates custom emblems?

Thanks!
________
YAMAHA XS-1