I have a UCD 46 and UCD 60. The 46 has a saito 72 and the 60 has a saito 100. I'm currently running a APC 13x4W on the 72 at 10700 rpm. Is this prop too small for this engine and what is the ideal rpm range. I was planning on putting a 14x4W on the 100. Is this prop also too small?. What prop is recommended for each engine? I'm sorry if this answer is in this forum somewhere, but I did not want to read all 2000 + post. Any information would be greatly appreciated.