Mine has 173k miles on it, original clutch. The only time I've experienced this is if I try to shift into 1st gear before coming to a complete stop, which is not very often. No grinding or synchro noise, just takes a little more push to get it into 1st. Most times it goes in with no resistance. Sounds normal to me, I don't think that you have a problem. Try not to shift into 1st while still moving.