DazDaMan, are you asking if the 110’s had the capability for syncronising i.e. by selection? Not wanting to belittle anyone, but some aircraft do have a selectable capability. The pilot gets the rpm’s near to equal and then selects ‘synco’ on. One of the propeller governers is then automatically and continually adjusted to keep the engines syncronised. This system is still in use today on many GA twins. I don’t know if 110’s had this facility. Looking forward to finding out.