This is a kit that requires welding. Nothing wrong with it just that the kit is $1800 before you add shipping. Best to make one your self using off the shelf bits.
This unit is basically the same as mine. The only real difference is I used 3 SS tubes to support the vane head and the push rod is exposed where as the Bouvan uses one larger diameter tube that hides the pushrod similar to Flemings. All three use the same dimensions and ratios.