depends how old it is to be fair
you need to be looking at the serial number
if the rear of the drum is very close to the back panel, then really, its the best option
trouble is, if you fit the shaft kit and belt, all you’ll get is ‘ it didnt scrape before you repaired it line’
when you take the drum out, look around the panel and see if its been rubbing, and point it out to the customer, or ask them if its been noisy, previous to your visit, that’ll help
good luck