A big thumbs up to HPI customer service......called them regarding the V1.1 bevel gear, left a message, called back within 1 hour, just simply tell him my address, and said it will ship out within the next hour or so....and asked does my PRO 4 has any known problem or so.....(I wish I can make up whole bunch of stuff and hope HPI will send me another PRO 4 for free......but, I can't)
I haven't talk to someone that nice as a customer service rep....I am gald I have 3 HPI now....
P.S....Hope I can get some extra HPI Pro 4 stickers....LOL
For those who didn't do the upgrade yet...call (949) 753-1099, then press 3, then hold, you press 1 to leave message (you should leave message...they will call you back very soon)....tell him your name and address...done, no stupid question asked.
Thanks everyone here that shared this awesome information...and thanks HPI.