The following is the manufacturer's warranty policy as published by Starlight Instruments.
Warranty
We offer a Limited Lifetime Warranty to the original owner. If during this time any part of the focuser fails or wears out prematurely we will replace it free of charge. The warranty on our products is voided if for any reason they are disassembled, tampered with, misused, accidentally damaged, and/or modified or altered in any way, or by the addition of after-market products not approved by Starlight Instruments.
There are many adjustments to the internal parts that are factory set and these should not be tampered with or adjusted by the customer. If warranty work is requested we will require proof of purchase.
From our experience it is unlikely that you will need this service – That has always been our goal.