What is the difference between ordering the whole system and ordering the saddle only? I'm trying to save some money because things are a little tight financially right now. Anyway, I mentioned this on AT and someone mention that I should buy the saddle only and and order the rope seperately. I can make my own tree strap and lineman's belt myself. I like this idea since I hunt a variety of tree sizes and having the correct size would cut down on unneeded weight.