Steamylc,
None of you links worked for me.
As for the flat tire, you can have the tube patched if it really has a hole. Did you confirm the actual valve stem is holding air and not the problem? The air you hear at the valve stem could be air bleeding out from the open space between the tube and the rim...when you refill the tube the air between the rim and tube has to escape somewhere.
If it were mine I'd take it to a truck tire shop and have them fix it...
Mike B
