The Pioneer II version was available as plans and in kit form from Marske Aircraft Corporation for amateur construction.

The aircraft was constructed with a wood and doped fabric wing, with the fuselage made from steel tube and fiberglass.

Unlike on the original design, roll control was changed to ailerons, with upper surface spoilers paired with lower surface dive brakes for glidepath control.

To simplify weight and balance considerations the monowheel landing gear is located on the desired C of G and the pilot's seat is adjustable fore-and-aft.

[2][3] Marske has built a prototype Pioneer III, an all-composite variant of the basic design.

The Pioneer III is intended to be 100 lb (45 kg) lighter than the Pioneer II, produce a 20% drag reduction and be optimized for flight in weak lift conditions.