Originally Posted by Ricky Bobby

It doesn't matter - the rear has factory 30% anyway I think, unless you have one of those rare fishbowl models - mine has been tinted 15% all around a month after my purchase in December 2011.

The size is 1 1/8" plug inner diameter on the hole - 25.4mm is 1" and 1/8" is 3.175mm so a 28.5mm plug would work if you can find that - I found a plug that was 1 1/8 and it still works great.

For those who are wondering, I think I'm at 2+ or even 3+ years since deleting - have not missed it once even in winter