Hi Pete
it's mainly down to the fact i personally prefer my glass to be textured and specular.
if i wasn't a fan of these processes i would have had to fix the glass by now but i used the method from day 1 it became available as i liked it
and it's now current on all models ;-)
more luck than judgement i'm afraid,
although the other reason is i am a real stickler for modelling using the last version of the available tools and sim version which this time has been a problem as not many have gone with me to FSX
but hopefully after the Anti hype that FSX produced has settled down and people move over they will once again get a few years out of my newer models.
somewhere i have full cabin models built but in 2001 i didn't have enogh PC power to compile the huge 1mb model (hawk is a 6 mb model just for outside!)
One day i might do a rebuilt but it's got so complex that it's not an easy task.
i hope it doesn't keep evolving at the current rate as every rivet will be modelled in another 6 years!
Regards
Rick