adequately stable for an AccuForce wheelbase
AccuForce power-on calibration includes abrupt direction changes,
which provoke rattles in other than tightly-attached and well-built steering wheels.
Calibration cycles also facilitate evaluating wheel stand adequacy,
by resting hands on left and right stand edges, to sense reactions.
Beyond shorthand for t-slot aluminum extrusions, 80/20 refers to the Pareto principle:
- 80% of result derives from 20% of effort.
IMO, that wheel stand yielded 80% of the benefit of a full sim chassis, since while busy driving,
I am oblivious to seating position differences from my CRX del Sol or recollection of track cars.
A key issue is that, driving in VR, I reach for where the shifter appears in the HMD,
which is typically wrong and distracting; easily changed shifter position is wanted.
Rather than fully implementing a new DIY wheel stand in 8020,
replacing tubular steel legs of this stand with t-slot extrusions is a Pareto solution.
Since those legs are 25x25mm, 25- or 10-series is the fitting choice:
Drawbacks to these extrusions:
- 10- or 25-series hardware is relatively rare and expensive
- 9mm core cross-section makes these less rigid than tubular steel legs replaced
- rigidity is mostly recovered by adding a diagonal brace across the back.
- I wanted to standardize on M5 screws, as used for wheel rim mounting
- but available 10-series T nuts were threaded 1/4-20
- one hole of corner brackets was drilled out from 5mm to 1/4-inch.
