The Slim Zeek designed by Dan Sobala is an approved Nostalgia design that also qualifies for the new Vintage FAI event. In 1955 Dan flew his Slim Zeek in the international team trials missing a slot due to timer trouble in the 4th round. The Slim Zeek uses the elliptical wing with an under-cambered airfoil, and tail from the Lew Mahieu designed Zeek, as kitted by Premium Mfg. Co. To reduce weight and drag the fuselage and frontal area were reduced to produce the “Slim” Zeek. The 1955 FAI rules required an ROG takeoff so Dan devised a retracting wheel design. Today utilization of a typical skid is more common. Slim Zeek has a wing span of 50” and an area of 397 sq. in. 1955 FAI rules required minimum wing loading of 12 grams/ sq. decimeter or 3.93 oz/sq.ft.; or 10.97 oz for the Sim Zeek. Power loading was set at 200 gr/cc. Therefore with a .09 model gross weight should be 10.6 oz and with a .15, 17.6 oz.