JIMS MEGA NUT:

Was surfing and came across this little piece.....wish I had known about it when I did my 30t. It's just that added security when you replace your main drive pulley with something other than the stock 32t.

Wanted to make some aware of this product if you're thinking of regearing your bike.

 

Over at HTT I saw a Thread talking about a pulley nut from 3guyz.com that looks identical to your pics - all the reviews were very positive. I don't think it is worth the effort to install it when you have done a good job with the HD nut.

 

Yup I agree. No point of taking it off if you already done the pulley swap w/ the HD nut, but worth getting if your about to tackle the project from the beginning .