on the dle-55 i used evolution 50 mm standoffs one 1/8 wood spacer and glued the 1/8 da pattern on the firwall to get a 2-1/4 spacing in turn gave me a 1/8 gap between the spinner and cowl the stock dle standoffs are 2-5/8 long and would have had a 1/4 to 3/8 gap at the spinner