If you go back to tab # 59 about half way down you have pics of you with a helmet on. Don't know what you used for seating at that time. Any thought of using the bump in the rear body work for a head stop is out out of the question as those pics show it at your neck level.
Another thought is that after you do decide what seat with padding you use the roll bar you now have may not be tall enough for your head to be under the the top of the roll bar. Even in club auto crossing, I believe, there are minimum's standards of how much higher the rollbar must be over top of one's head.
This is all factored in to how you permanently mount the seat for your comfort. Solidly or adjustable mounted to the chassis.
The old photo with the helmet was before the bar was mounted. Its about 1 1/4" higher now. ( the mounts on the floor )
But you are right I will need to add a head restraint to the bar. Will need to work out the path of the rear body work as it opens.
Will take a look at the SCCA book for a guide.
Need to add a take up spring to the front for droop.
I'm printing a follower for the small shock that I am running.
The body of the shock is like 1. 75".
Could not find some one that Selles something that small ?
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Been working on the coilover spacer.
Think I have it worked out .
Sometimes you need to work things out.
Springs will be here Monday.
All the models were PLA but will print them out of PET-G and see if it will work ?
Maybe ABS or ???
Tomorrow I will do the setup for PET-G and see if I can get it to print.
Not sure why the printer stopped working after being parked for 1/2 year ? Out of use.
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Back at it with the Aluminum ! Can't believe how much time it takes to make just 2 panels.
Remember all the glass work to make the side panels ? Just cut some of it out. And I have more to remove.
Had to work out the hinge. I forgot it needed to be put in backwards.
So many things to keep thinking about to make it look good.
Well on to the other side and then welding the dash to the side panels.
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In stead of trying to blend in the curvature at the front corner, make a separate piece. This way the flat piece of the door is smooth into the cockpit. Trimmed to how you like it.
Or you can make a buck out of plywood as a mold and make a fiberglass shell of the door with the bump at the front blended in.