can anyone give me information on the Clark 4/1/2" angle grinder from tractor supply. the grinder is 8 amps & you can get it in the 4 1/2" or the 5" for the same price of $34.99 has anyone had any experience with using this grinder & what would be the advantage of getting the 5" over the 4 1/2" both are rated at 8 amps.I do know 5" discs are harder to find & more expensive. any advice would be appreciated before purchasing.