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Nice looking stuff!


 You may be able to get an acceptable match with direct feed (Cebik lists a 7 element yagi with a 1.043 wavelength boom at 46 ohms +8X), but I'd still use a balun. 


Palomar Engineers sells a choke balun kit (ferrite beads and heat shrink) to fit RG8/213/LMR400 for 17 bucks plus shipping.  I just ordered one last week.  Not bulky, fairly light. 


Just curious-- I'm assuming M107 has a gamma match from the factory (since most commercially made yagis do).  Why the change to the insulated DE and direct feed?  Were you having bandwith or mechnical problems with the gamma, or just decided to try something different (nothing wrong with that, by the way).


Nice tile floor, too.


          Rick