I manage fuel in the same way with my Jab 2200 (similar hours) and have had no issues to report. There is a second Jab in my hangar, does the same, and he doesnt have any probs either. Seems like 98 is OK for the 2200.
If I'm away for any length of time (more than 4 weeks), I try to use up as much fuel as is prudent, and when I fly next, put a large quantity of new fuel in both tanks, and make sure I give the engine a good warm up period.