Hello, HUGE fan of your mod. This is only my second time commenting because I am usually able to find solutions, but this one has me stumped. I decided to hold off updating to 1.9 to allow time for moders to update. I know you have updated, however, I am having a problem with rotational parts not appearing. The best explanations I have found so far is unity update problems, but as you have already updated to 1.9, I don't see how that could be the problem. The bagel rotational part is missing in the tech tree and the parts tool in the VAB, but it still shows up on craft I have already built with it, however, I am not allowed to launch it. I'm curious if there are any troubleshooting steps as this seems so isolated to just the rotational parts.
Thank you in advance for your help, and thank you for an amazing mod.