To clarify: There is no such thing as a 3.7V
atomizer. I take your statement to mean that you are using an LR 510 atty on a mod with a 3.7V 880mah
battery.
I don't understand why you "pulled out the poly threads under the bridge." Unless one is a knowledgeable seasoned modder, I don't recommend fiddling with the inner workings of e-cig atomizers (or batteries).
LR 510 attys are intended primarily for lower voltages such as the eGO and cousins. For example, 1.5 ohms on a 3.4V eGO yields 7.7 watts; 1.8 ohms on that battery is 6.4 watts. This is sweet spot zone for many vapers. At 3.7V, that 1.5 ohm atty is 9.1 watts (might be good for some), but a true 3.7V battery
starts out at 4.2V fully charged:
11.8 watts (too high for most). And the real problem is the
2.8 amps of current at that level (compared to the
1.3 amps of the standard 2.3 atty on 3.4V). I believe
this is what is causing that "burnt oily taste."
You may want to experiment with 510 atomizers of different ohms: 1.8 if your atty is 1.5 ... or 2.0 ohms (e.g., from
Ikenvape). And you might be very happy with a regular 2.3 ohm 510 atty on your 3.7V battery: 6 watts (starting out at 7.7 watts when the battery is fully charged).
I've never used Toby's M601. I'll just point out that the optimum ohms resistance varies from model to model. For example, compare the 3.7 ohms of a standard 901 atomizer with the standard 510's 2.3 ohms. Each is effective for the respective atomizer (and the battery designed for it).
Many of us have found that tweaking the voltage or resistance
to some extent intensifies and improves the vaping experience. Going
overboard, however, burns out attys and ruins the taste.
Whatever you do, constantly keep the atomizer very moist. I would drip at least
3 drops at a time (and frequently) with your set up.