Whelp, flask bit the dust tonight. Knocked it of the dresser on to carpet accidentally. It landed on the drip tip of the subtank mini straight up and down. Hit hard enough to bend in the positive on my vtc4s. Knew it wasn't a good sign when the batteries slid back and forth inside. New batteries do the same.
Subtank mini still hits like a champ though.
What a nightmare! Sorry to hear about your Flask.
Get in touch with VF I'm sure they have a repair service, not sure what they charge though.
Hope you get it fixed.