Some advice would be helpful
#1

I happened to buy an rc car and while testing everything worked fine. However when I wanted to change the pinion, I observed that the grub screw was stripped. This made me check other screws and I've found out that more than 10 other screws have been stripped by the Seller. I was not informed about this. I have tried removing the screws with a dremel with no success. This implies I have to replace the motor mount, a graphite upper plate, differential upper plate and the front shock upper plate which amounts to amounts to almost $100. Should I open a PayPal dispute for at least a partial refund?
#2

I would begin by expressing your discontent to the sellers and seeing if he offers any sort of compensation. If not, then pursue a partial/full refund.
#4

by chance could he have had quality drivers and snugged everything down tightly then you buyer have less then quality tools causing the screw heads to strip out when you tried to get them off?
#5

I did think that I might have made a mistake while trying to remove the screws and hence took them to a professional place to remove them, with no success.
#6
Tech Fanatic
iTrader: (5)

A lot of people are quick to file a dispute these days. I would try contacting the buyer and seeing if you could work it out between the two of you first. If that doesn't get you anywhere then consider a dispute. But always best to work it out personally if you can I think.
#7

I hate to say it, but once you try it fix the problem it is on you now. If you noticed screws where stripped I would have left it and contacted them then. But you attempted to fix the problem yourself first it should now falsl into your lap.
#8
Tech Adept
iTrader: (37)

Like everyone has said, contact the seller immediately and tell him what the problem is and try to work it out. Worst case is he sends you some funds to cover new screws(?)
If you still can't get the stripped ones out, take a dremel with a cutting disc on it, and carefully cut a line across the top of the screw head. Go deep enough so you can get a good slotted screwdriver into it solidly. Use that appropriate sized slotted screwdriver to back the screw out. I've had to do that many times and it will work.
Still contact the seller though!
If you still can't get the stripped ones out, take a dremel with a cutting disc on it, and carefully cut a line across the top of the screw head. Go deep enough so you can get a good slotted screwdriver into it solidly. Use that appropriate sized slotted screwdriver to back the screw out. I've had to do that many times and it will work.
Still contact the seller though!
#9

Try a small flat tip screwdriver, I've had success with using that to fit in there good enough to get them out. With the exception of the grub screw, I've used a cut off wheel on a dremel to cut a slot in the top of the screw and then use a flat tip screwdriver.
Last resort, return for refund, "not as described".
Last resort, return for refund, "not as described".
#10

for the parts that are stripped, are they threading into metal?
If so, have you taken say a soldering iron and heated up the screws first to see if the problem could have been related to threadlock? usually if I have a stubborn one I will do this to break the threadlock bond, even blue threadlock depending on the location and amount used can be a problem.
as others have suggested, slotting and removing via a screw driver is usually what is done unless an easy-out is available for the screw size.
If so, have you taken say a soldering iron and heated up the screws first to see if the problem could have been related to threadlock? usually if I have a stubborn one I will do this to break the threadlock bond, even blue threadlock depending on the location and amount used can be a problem.
as others have suggested, slotting and removing via a screw driver is usually what is done unless an easy-out is available for the screw size.
#12

Thank you for all the suggestions. I contacted the seller and he has agreed to refund the cost of one part.