Yeah been ordering from tower for the past 5 years or so, always arrived within 10 days including an order a few months ago before USPS changed their postage getting rid of surface mail.. Maybe thats choked up the air mail a bit?
Received an order this monday which I ordered on the 11th of july so almost a month. Part of the order (a single RC10T2 bumper bar ) had to come from Reno, Nevada which came in under a week in a padded bag.

Bit of a shame since you used to be able to break something on race day and have a replacement part by the next race meeting.