The conversion process took two years of hard work by mainly amateur builders in their spare time.

The company claims it takes an amateur builder 500 hours to build the FP-404, "using normal household tools".

The company claims it takes an amateur builder 500 hours to build the FP-505.

The company claims an amateur builder would need 500 hours to build the FP-606.

Aluminium is very expensive in most countries and it is usually not used by amateur builders.

The company claims an amateur builder can complete either aircraft from the kit in 600 hours.

From the mid-1980s, three examples have been commenced by amateur builders, one of which first flew in 1987.

The company claims an amateur builder would need 600 hours to build the R-80.

This was followed by a larger number completed by amateur builders in France and other countries around the world.

The company claims it takes an amateur builder between 300-500 hours to build the FP-303.