Looks like this post is a couple years old and I'm not sure if my question holds any relevance to your post but here goes.. I'm currently running a zee crankset and I am using an MRP G2 chain guide. I just ordered a renthal SR4 chainring and I'm wondering if you had any issues with the 5mm width rubbing inside your chain guide or if you had to use a spacer or how it worked out for you. Thanks