Looking through the various ball valves, bits etc, it looks like I need to cut 22mm, 27mm and 35mm holes to install a couple of plastic water tanks. Can anyone suggest a suitable cutter(s) for this?. I've seen various expensive holesaws and the like in Screwfix. Problem is, once used this tool will end up adding to my relentlessly expanding 'bought for one job and will never get used again collection"**, so if possible I'd like to buy 1 usable cheap item and throw away, hopefully!.
Thanks, Egremont
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** One of the most frustrating things about DIY, perhaps eclipsed only tbis syndrome... You need a small amount, 'x', of something. However you have to buy (ie pay for) a pack of 10'x'. This leaves you lumbered with 9'x' of said something, probably bulky, which hangs around for years until you eventually lose hope of finding a use for it/them and so the 9'x' (you paid good money for) ends up in the bin. And if you're really unlucky, you find a use for it soon afterwards!.