No need for a whirlpool arm to chill wort.I thought about it, but since I’m going to no-chill I decided against it. It’s for sale from BKT regularly for £19 I think, so I decided if I fancied it at a later date it wouldn’t break the bank to pick it up later.
Maybe a little early to assume you'll not be chilling wort. Try it, I'm sure you'll prefer the results