I have now cut through 12 Sigma 10mm hoods with only 1 casualty. The problem is the hoods are made of quite thick aluminum so care must be taken. The hood is only 2 mm from the lens so a hacksaw is out the question so I bought this bench drill and grinding disc specifically for this task.
BE VERY CAREFUL – the filings will get between the casing and the lens and STOP the focus from working! – Blow away filings as you go AND at the end test the focus with the lens facing the floor so any loose filings work outwards rather than further into the lens.
What’s the advantage of shaving off the hoods?