hello ron, thanks for the good advice,this is my first laser engine so i want to be 100% sure of all aspects.Spent last 2 seasons flying martin bedding lazer 200 using os91 surpass and various irvine engines.Like i say first 150 so need to be sure. Chippie wing is finished with silver solertex and fitted with oleos ,going to start fuse closer to winter.The only thing i altered on the wing was the servo mounting,would much prefer to have servo heads popping out for ease and maintenance. Did you go with the rates that the manual suggests? I will attach some picts shortly. frank