Dash back together and seats update

The dash is now back together, the reset button looks good and the defect on the edge is pretty much gone;

The car has been cleaned and ceramic coated so I'm ready for Saturday. 

In the meantime I had a go at profiling the seat. It does look like for comfort I need to bring my knees up quite a bit. A fellow Locostbuilder sent me a link to a thesis where it talked about seat positioning, this is one of the photos;

This also confirms the amount of knee angle that I should be aiming for. Even in this picture the pedals are lower than the seat, whereas for mine they're at the same height.

As a guide I tried some rolled up blankets as bolsters;

This is a 3 inch roll, and while it helps it's not enough. Also that's based on the back of the seat still being the same height. Adding a second blanket gave me this;

I think this is on the right track. The seat base is 18 inches deep so I'm thinking;

• First 6 inches will be a 1" thick pad
• Middle 6 inches will be a 3" pad
• Last 6 inches will be a 5" pad

Given that I want as much of the 5 inch pad as possible, I'll profile the other two layers to come up and meet it. This sort of stack (side view);

Even that might be overkill. For example many tintops just have an edge bolster for support, like these Porsche Recaros;

Or Cosworth recaros;

So I could do this;

The final option is the 'messy' option, which is a bag of PU foam and a bin bag! That would be to form a well fitting seat while I'm sat in the car. I'd still need to bump it up a bit, the expanding foam would only fill gaps where my butt wasn't touching the floor but I still want to have some padding for my back side.

I did have a thought that I could 3D print a seat pad... I have TPU and I reckon maybe 10% infill might work. I'll print a test piece and see if I can sit on it comfortably.