JJ's advice is spot on as usual. That would be a great cycle. I like to run LR3 at super high doses eod for 1 month. If using lower then 6 weeks should be great. I wouldn't use it longer than 6 weeks though unless you are micro dosing it. Personally I prefer 4 weeks on 4 weeks off etc.
The guy who mentioned prolactin, cortisol and water on MK-677... as JJ stated pretty much no. Most are likely going to put on water retention regardless of those levels. Although if you have had a blood test and both are elevated I would recommend pramipexole or cabergoline plus vitamin c, cissus and of course aas
I always thought lr3 had a saturation dose which is why most stick with 50-75mcg.