Could anyone hazard a guess about what springs might be suitable for Martin Even's Springbok? He specifies 18g x 7/32 bore but gives no length. I intend to build extra weight in under the cab, and the frames are 4 mm not 1/8th, so it should be a bit heavier than typical. I must say I hate to see an engine waddling down the track on too soft springs. Buying something suitable would be ideal but I could have a go at winding piano wire if necessary.