anyone using custom advance stop bushes?

[benno440]

just wondering if anyone is using custom advance stop bushes in there distributor?
I got a 10* and a 14* bush machined up as MSD only offer a 18* as the smallest.

Do they have to be a different shape then round as when round it doesn't slide into hole.
any tips?

 

[440+6]

I bought one of these for my MP distributor, it has 0 (lockout) 10, 14 and 18 degree limiters, got it from here
http://www.4secondsflat.com/Ignition.html

 

[benno440]

thanks man, I forgot to mention msd distributor