I bought a good Japanese blade saw and took it out of its wooden handle, and welded up a custom mount using a paint roller handle that fit the original holes in the Japanese saw. I use a 30 foot telescoping painters pole. Works well to cut high branches, It does require some time and muscle power but it suits me. I have the Toro trimmer, with the extension sections and the saw head that uses reciprocation blades.. but I would just as soon use the manual saw, I can reach higher, and it is much lighter to hold.
James K0UA