diffuser/venturi

[1303R]

anyone on here using a diffuser to get down force on a beetle? i'm thinking about getting high speed grip and don't want to have a big rear wing. i thought about a rear diffuser but there's not much room with the exhaust and engine in the way, may be enough if i use the space under bumper as well. or a venturi in front of the rear wheels? anyone done/doing/thinking bout this or am i wasting my time? cheers