I'll get my remaining one out and use the calipers to measure. I used Loctite on the last one but maybe I didn't leave it long enough. I'm going to use heatshrink next time as well.
These look like a possible option but I can't find a compatibility list or any measurements.
https://www.losi.com/product/screw-pin-clip-post-10/LOS236003.html
Thanks for the link, unfortunately those ones aren't going to work!
The ones I'm looking for appear to be a bit unusual, the pin diamater is quite small compared to the grub screw head.
I lost a couple of diff cup pins recently (locitite didn't hold) and I have to buy the whole coupler set, which is quite expensive when I don't have any need for the cups.
Here's a pic of the set I mean - I'm just after the pin grub screws. Any suggestions much appreciated! I'll be putting...