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Thanks Clark and Linz for the instructions.

Most photo's we've taken have been with the tunnels off as they get in the way. I've added a side profile so you can see the start of the tunnel and also where we've planning on changing the rear at the end of season to better use the extractor wing.

Car's got a problem with purpoising now as we had a front diffuser problem and we raised the front slightly (10mm). This gave a large increase in grip.

Yes Clark the current shell, how the car ran with its flat bottom does have a large drop off and this is why we're working on a new lower profile rear for next season. So many things you'd like to do but so little time, gather that's what happens when this is a hobby and you have a office job that supports the family and allows to play with toys like this

We are currently designing a new body to better suit the car. Reducing it's front area and refining the shape to reduce its current drag. It current rear actually has quite a large duck tail which we've never liked

To put in perspective the MDF on the back sits in effect at the start of the black (lower) on the current body up by the roll hoop.

I feel the problem we were having was that the front was being starved of air through both the front diffuser and tunnel enterance when it sucked itself down. yes the raise would have had an impact of roll centres but will do some more analysis on the datalogger. Was shift towards front bias as earlier had trimmed out the rear wing to get a good balance, I'm encouraged by this as I want the additional extractor wing (not pictured) have a slight forward bias when additional AOA is used. I can then trim with the upper rear wing. Hope that makes sense.

Part of the front problem appears to be the orginal front diffuser was strong enough and showed wear from flexing. Need to start a shock testing process