I recently purchased an OF-211(L) mainly out of curiosity. My average search depth with it is the max of 236.2m while with the OF-105 I am at 221.7/261.3. My record depth with the 105 ia 711m after 1000s of bombs. With the 211(L) I hit Megan Stone at 762m with the first 10 bombs or so. I got it for 115% so I think I will stick with the 211(L) until my depth is equal or greater with the 105.
I use the OF-211(L) too , curious is that in the whole mining thing in PE i could not see any connection between searching deep and the real deep i find ore or enmatter. I often can find some tiny deposits in deep >700m.:-& The rarest i found (after mining chage VU) was 1 stone azzurdite two days ago:roll: In fact of the high prices today i would use the limited tools until i can afford a better tool :)