So much for all the tuning sweat.

Personally I prefer not to drill because of all the crap that can get in then, but sometimes I hate popping off links so I drill them if I can't use open cups (I have a whole stash of Yokomo cups/balls with perfect fit, and play free unlike Tamiya's). A play free joint will show wear a lot sooner, Sosidge.

And here's a tip. The fluorine coated ball nuts for TRF dampers (Tamiya item #42231) are a perfect fit for the kit tie rod cups. I replaced all the balljoints on the car with these (pretty exxy, I think I used about five sets @ 10$ a pop?) and I drilled the cups when I realised I would wear them sooner if I kept popping them off. But the car is absolutely slop free now and smooth as butter. I like that in my cars.