I have two bicycle rims - one large and one medium sized. Any ideas on how to make a tower for vines? I thought about putting the larger rim on the bottom (for more support) and putting the medium sized one on top. Not sure how to connect a pipe in between. Any ideas. I thought I could run fishing line from top to bottom and tie to the spokes of each one and tie pieces between them (like a net) to give the vines something to hang on to. Any help would be appreciated.