Over the winter, I sent mine back top Winter (No US repair
facilities). Got it back in a
reasonable time (I told them no rush to return) for a fair repair cost
(way less than half the cost of my generic spare). If it had not had
my address label on the case, I would swear that they just sent me a
new unit. Big PLUS...The repaired ASI now matches the speed of our
tow plane leading me to think it had been failing for a while.

Tips for others:

1. I sent my ASI to Germany via US Postal Service (Yea, the snail
mail people who loose everything). Got there safe and sound for one
third the cost of (Fedex, USP, DHL...). They return shipped by the
German Postal Service. Looks like just over a week for return
shipping.

2. Very trusting folks over there. Sent ASI back with an invoice in
EUROS! Winter does not take MasterCard/Visa. After lots of head
scratching and obscene rates to get bank draft in Euros, I stumbled
upon PayPal as a method. PayPal took my Visa, converted it to Euros
and sent them for no fees other than the currency exchange rate.
Fast, Easy, Safe.