Very interesting Adam.
I purchased several of the Dunham units with their air operated closer for custom applications in the past.
I modified the overall length to better accommodate the specific job but other than that they worked very well.
I found very little to compete with them so yours would be much welcomed to consider as an alternative.
Would you offer customizable options for the overall length, spacing between the bearings and the rear tube configuration at or very near the same price ?
Quite interested.
Thanks,
Russ