I just drilled one of my 505A's and will post a full review later this week as I get some games on it.
I drilled it with a 3 1/2" Pin Down MB at 35 Degrees.
Pics will be posted as well and I will post the link to both sites.
--------------------
Billy Ray
Track Pro Staff
Owner Rays Pro Shop
At The Playdium
"Let Us Help You Become More Competitive"