reverse crayford

Hello All,
I am starting the decision tree for building a 12 inch
f/5 truss dob with a 2.6 inch secondary . What are the pros and cons for the use of a reverse vs. standard
focuser ?
Thanks in advance.
John

"What are the pros and cons for the use of a reverse vs. standard
focuser ?"

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I think it just comes down to cost. The JMI kits for their RCF are very affordable, for a decent, well behaved focuser. They are not a high end duo speed unit of course. But light and smooth. I have an f/5 scope with a pretty stout rack and pinion on it. The RCF on my f/4.5 is far easier to find critical focus with (even though the range of focus should be slightly smaller). An RCF on the f/5 is on my to-do list.