Hello. Thinking of buying an understring radius gauge to easily set the string heights on my Strat. So my questions, 1. What is the general consensus on understring radius gauges? Useful or money down the drain? 2. Do you believe that buying a set of 8 with the most popular gauges is advisable? In my case a single 9.5" that I need would go for 7 USD and the full set of 8 pieces would be around 18.5 USD postage included. I just can't imagine why I would need the remaining gauges at this point but I am a newbie so perhaps I am missing something. Do many guitars use these gauges? An LP model for example (which is definitely my next guitar) does not to the best of my knowledge. Many thanks in advance for all the help!