Not sure if this should be in hybrid, mountain, commuting, or anywhere really.
I have a Magna Great Divide 21 speed BSO that I use for limestone trails and family rides. I'm looking to upgrade it on the cheap, like really cheap. I've put on some 26x1.75 Forté Gotham tires, added some MKS pedals, changed out the from suspension fork for one only slightly better, changed out the rd for a shimano tourney, and I'm in the process of repacking all the bearings. I have a Forté saddle and alloy seat post I'm going to buy, it has panniers and a cheap rear rack. I'm going to get a set of trigger shifters, just like them better. What other changes or upgrades can I make to make it a little more comfortable and ride just a little bit better? Keep in mind I got this bike for $15 to use as something I can not care about and other than tires (which cost just under $30/pair), everything have been out if the parts bin. The budget is a low as possible.