do they have multiple version of 510? how may i identify it?
JPG wrote:It is not a 510/520 thing, but rather a previous vs current thing. Yes the early 510 were different still. My early 510 has holes. Which 510 version do you have?
The difference between them has to do with how the rails are attached. The early version had tapped holes
in the table
and were secured with torx screws. That required holes
in the front of the rails to access the screws.(the most obvious detail).
The current version has kep nuts and studs welded to the back side
of the rails.
A pickey detail is the earlier rail tubes are thicker.
Most likely you have a 'later' version, but I wanted to compare 'the holes
'. What size are the 'mystery' holes
and are they tapped?