What you must bear in mind is that there is the 'fast' limit mode as on the 2254E,
which shorts out a resistor...but it doesn't....or shouldn't....
I never liked the 'fast' position- some strange things happen at certain high levels, but all is well if you put a 470 ohm in series with the 'fast' poition of the switch.
On early 2254E, the 'fast' position just shorted out a resistor between D and E on the 185 board.
On late modules and the 32254E's, this 'shorting' loop was taken to pins J and L on the rear connector.
Between these pins, in the rack, not the module, Neve fitted a 470 ohm! Same as I found by trial and error before ever seeing a late 2254E.
Here's something to keep in mind- many many times I've had 2254E's in a rack sent to me for a rebuild.
Each time I asked why they liked the 2254E over the other modules, and why they had paid extra for them.
Each time I was told it was because of the 'fast' position on the limit switch, which they loved.
I think from memory four or five times they were late 2254E's, with the loop to the rear connector,
but the modules were in an older rack, with no resistor fitted......
Therefore, these guys had the 'fast'position making no change whatsoever, but all of them loving it....
They were all from the same country, that's all I'm saying....
Also keep your eyes open for the little- known B507 board in place of the B185 in late 32254's. I'll try and dig out the circuits and some factory memos that explain the differences.....