Welcome NMB, your certainly won't have that problems with the RM2. Congrats. Keep us updated with pics and your experiences of the goodies. I agree, start at 1.8 ohms and work from there.
My advice: Put away your meter for the time being.
Cut a length of 28AWG Kanthal, use a precision screwdriver or 1/16" drill bit and wrap a coil with 10 to 12 wraps. Install that coil on your RM2 and install a cotton wick. Mount the RM2 on your Grand, fill the bottle, soak the wick good, and pop in a fully charged AW IMR 18650. Take a few vapes. As Super X already advised you, too cool = lose a wrap or two; too hot = add a wrap or two.
In my humble opinion, micro-coils vape amazingly well within a range of resistances. Anywhere from 0.8Ω to 1.3Ω gives me a very satisfying vape. Using meters and knowing your exact resistance is fine and dandy, but not particularly necessary.
Enjoy your new gear!
Interesting I was investigation Kanthal and found resistance per foot
32 ga = 13.75 ohms per foot = 1.146 per inch
30 ga = 8.36 ohms per foot = .697 per inch
28 ga = 5.27 ohms per foot = .439 per inch
3+ years off stinkies and using 3 Reo Woodvils, 2 Reo Woodvil 18490s, 2 LP Reo Grands, 1 SL Reo, 1 Pdib Dibi. 3 Chalice II, 4 RM2, 2 Cyclones, Divo, RM5, 29 ga kanthal, ReadyxWick, Ikenvape RY4 Gold and unflavored nic.