I have found that there can be a large difference in parts price from different vendors. Helihobby sells the enhancement kit for 28 where heliproz sells it for 22. I shop between Horizon. Helihobby and Heliproz. Heliproz was the cheapest on my last order then again I have to wait a bit longer. Before anyone bashes me for not shopping at my LHS they never have anything in stock. I would rather pay the extra few bucks and have the part now but they have not had parts or kits for three weeks!