Well I finally got round to doing the snorkel on my sporti. As on the Vit the original intake is just behind the headlight,just the right place for a bow wave. The idea was to keep the cost low, so it came in about £20.Lentgh of 68mm drainpipe,90 & 45 degree bends, length of flexi pipe (from building site),Daz (11 liquid tabs)for scoop and fibreglass kit.
Hope it works in water as it did in mud.