i dont think its the syncros. but alot of people say that they cant get there cars into first when rolling. i know that i can and i have almost 100k on my car. i can go into first at 20 25 mph if i wanted to.
Mine will go into first while rolling (also under 25Mph), just have to lean on it (just gentle pressure, NOT FORCING IT) for a second. I am using brand new MTX-75, new gear set and new synchros. My old equipment did it too. If it won't, it could be your synchros or your transmission's allignment. How are the other shifts? How is first from neutral when stopped?