Quoted from gordonshumway:1) Just did my Beast mod and we put them in from underneath. Was simple. Put them in place, apply pressure fully seated and put the screws in. The screws JJP sent were wrong. I simply picked up wood screws from Ace and no issue. We immediately tested each Beast and there was no rubbing. I'd estimate the total time to install all four was less than a half hour. Have not had any jambed ball issues since.
2) Did the ramps at the same time. No issue doing the mod, getting the ramp out was about a half hour. Re-riveting was ten minutes. My ramps at 500 plays were starting to curl.
3) Bought the "new and improved" left rail for ~$100. Put it in in less than a half hour. Noted that I've had almost as many flying balls since as I had before with the old style.
I'm looking at possibly buying a Hobbit Smaug. Is there a more detailed explanation on things to look for/change? I see you've mentioned "beast mod". Is that a change or improvement and if so what's involved? TY