everything above is really, really good advice, but allow me to toss in my 2 pennies, as another relative newbie...
it sounds like you may be new to the wonderful world of Reos and RM2. it might be helpful if you established a
baseline, if you haven't already.
by that i mean that when i first started with Reos, i used a particular atty that i found to deliver nicely with whatever else i was
vaping at the time. if i tried a different atty, carto, juice, PG/VG combo, or whatever, i could always go back to my baseline for comparison. my baseline became particularly important when i got my first RM2 because i always had a point of reference for comparison.
while i had started with tubesteaks, those didn't really count as baselines for me, i guess because my early choice of Reo+atty already was superior to my tube stuff.
hope this helps.
oh yeh, i'm only permitted to make one useful post per month, so if this happens to be it, you would be well-advised to ignore my usual drivel, at least until the beginning of november...