[Nonfractal]

Urgency was added to this by a recent test evening at Molesey's wood track (last Thursday) as prep for the British NSR Grand Prix. 
I attended , primarily to get an initial feel for wood track, specifically:
- ride height
- guide spacing
- guide selection 
- tyres

I also wanted a chance to learn the track ahead of the weekend, not having driven this track since it was first installed , maybe 4 years ago.

As it turns out, the 4 items above were easily handled but braking was immediately identified as a problem. 
The brakes on the Molesey track are vicious and there is no rostrum plug point adjustment available. Coupled with the immense grip (truly immense) reducing the braking enough to prevent the car stopping on a sixpence was a problem.

I immediately noticed that Molesey members are heavily skewed in favour of tru-speed controllers. (I'm sure Steve is smiling as he reads this)
When  I visited 4 years ago, Molesey was heavily skewed in favour of the SCP2. Not the case any more and maybe braking control is a factor in the selection.
On the track, even setting the SCP2 to linear-1, the minimum setting, does not reduce the braking enough to traverse the corner optimally.
Using the Sweep time braking on Molesey track is a total non starter due to the scp2's 100% initial bite
Testing on linear-1 was bearable until the control was knocked slightly, removing all braking and causing an end of straight wreck.

So....
The inline brake choke project inferred in the OP, took on a new urgency.

Whether to build a separate box or integrate it into the SCP2 relay bypass box ?
A whole separate subject - covered by slot.it in the link here.
https://slot.it/wp-content/uploads/2020/...P1.en_.pdf)

My existing relay bypass box was not large enough for the components needed for the brake-choke. Thankfully, a trawl of my electronic dump-box brought up a suitable box of perfect size, along with scavenged diodes and a scavenged rotary switch (originally bought for a guitar pickup switch project)

The question of whether to use diodes or resistors was decided after enquiring at LSC about the braking technology built into their plug points. LSC use resistors and the general view is that this isn't really a good solution because it doesn't just soften the brakes, it changes the behaviour of the brakes. The voltage dropped by resistor is dependent on the current passing whereas a diode drops a fixed voltage.

I used this diagram as a base for the unit and built and tested a simple 4 position brake softer. This will certainly be good enough to have better control of the linear braking.

The only opportunity to test was at Nascot wood. Fri25th March and it worked well on cars using slot.it mx16 S-can motors.
Not an ideal test because NWSCC is Ninco Plastic, nothing like Molesey.

The only opportunity to test for Molesey was at the event.
As it turned out, any use of the softener circuit , deadened to power to the car.
It was almost like the brakes were on even if the throttle was being pressed.
This behaviour could be a result of:

- the wiring at Molesey
- using higher power motors at the event
- an unforseen issue with the SCP circuitary.

So..
3rd test will be at LSC on Tuesday.
Then I'll have to figure out the problem.
Maybe diode circuitary is just not compatible with some tracks.

AlanW