The guys on first is quitting today
and we are currently running 3.7MR1 and have MR2 and MR3 but are not installed. I want to upgrade to 3.7MR3 or even 4.0/4.1. What kind of problems can I expect? Probe issues? CAD issues?
I know a lot of you run 3.7MR3 and I would like your opinions.

I know a lot of you run 3.7MR3 and I would like your opinions.
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