I recently started doing some longer training rides (1 - 3 hours) and find that I am getting really saddle sore and my arms feel quite uncomfortable. I have a pretty TT riding position which feels great for shorter distances, but it isn't working for the longer rides. I have tried a more upright position and that feels even worse. I am also getting lots tingling in my feet and a bit in my hands. I have tried padded shorts, but they didn't really do anything.

I feel like I want to be have an even bigger distance between the saddle and bars, normally sitting towards the back of the saddle, but when I move the saddle back, it starts getting really uncomfortable.

I could go here: http://www.cyclefit.co.uk/ and spend £200 for a customised fitting session and custom shoe inserts, but I am wondering if anyone has some good tips on what to do to get a good fit. If I change something at the moment, it pretty much just moves the discomfort around different parts of my body.