Originally Posted by Wolf Hobbies

FYI:

You should NEVER use the steel dogbones with the aluminum outdrives. The ONLY axles compatible with the al outdrives are the 503151 aluminum shafts with the plastic pin covers. We work very hard to disuade peolpe from buying the aluminum outdrives. The weight difference is negligable and they die a quick death if the pin cover is damaged. I would like to stop carrying the al outdrives but some of our customers demand them so we try to talk them out of it but if they insist we will sell them.

We will be testing the K2146 and K2147 machined delrin outdrives this week during practice. We will publish the results