Well, I'm finally not getting the 404 error! Wow, what a lo-o-o-ong mess!
Okay, got my shipping notice from ProVape for the Harlequin Green and Pearl White. While there, checked the grooved beauty rings and the large flat Tatroe base $10 AND they have the silver Tatroe ext. ring $5. Unfortuately, the Tatroe large wide base is still out of stock.
Yay-y-y-y-y, for the ext. cap, Dale! That was a nice little "goodie" to get. Now, getting the $5 Tatroe ext. ring and adding then adding the ext. CAP you'll be able to use the 18650 battery.
Instead of using ProVari's same color ext. CAP for using the 18490/18500 battery, I will use the Tatroe ext. RING and the original end cap because it gives me a flatter surface with sharp edges. The ProVari is a bit stabler when sat upright.