I just purchased a 1986 Goldwing Aspencade 1200 and am building a trike kit for it because I am 74 years old with bad knees. I find it hard to keep the bike up when stopped or going slow, so I'm adding 2 more rear wheels. I could use the help and advice from experienced riders and trike owners. My main concern at present is designing a suspension that will work well but still be simple to build, no advanced mechanics, stay basic and simple. Thanks in advance for help and advice.