88 stubby tank with stock flatline drop?

[Magaholic]

I've currently got a flatline 68/3000 on my mag. I've been thinking of replacing the 68ci bottle with an 88ci stubby. Does anyone know if the stock drop that comes with the flatline can accomodate a 88ci stubby tank? Furthermore, I'd like to confirm that all these tanks have the same threads for the regulator. By that, I mean, I system bought from NitroDuck would have the same threads on the bottle (for the reg to screw in) as a flatline, correct?

I appreciate your help in this matter.