I use the Sagen Saw as well. It is very quick and easy.

I use a small saw that came with the buck knife. I'm able to cut thru the pelvis in about 10 seconds.

Works great!

I have a Sierra saw that I keep in my fanny pack thats a branch pruner/rib cage/pelvic bone cutter. It works great! I've had it for 10-15 years.
Goes through hair,bone wood like cheese cake.
The teeth on it are wicked and brother it cuts.
My buddy uses loppers but these aren't too portable to carry for where I hunt.
Also, the Sierra Saw by Coglan is only $10 in Cabelas catalog---great buy.

i do it the same way. sometimes i cant get the bone to break, so a little stomping is needed