I have just bought a 1998 Swift Silhouette which came without the handbook. I contacted Andy Spacey at Swift via Swifttalk late last night and an electronic copy was in my inbox at 8.15 this morning. Excellent service!!
I also have a Challenger 490L/5 but it's a 2005 model. If you are stuck on anything, you're welcome to ask and I will see if I can help - although some of the equipment may well have changed in the interim. I love mine!
Thanks but I have got a PDF copy from Swift. Yes I love my Swift Challenger and I am looking forward to having many holidays in it. I bought it to replace a very damp sprite musketeer!!