the pics are deceiving,its not actually that long,i think its the camera angle.the axle was only set back probably 4-6 inches further than where the original bike wheel was...the hardtail framework fixes to either side of the swing arm mount point and then i had two blocks turned up that fit over the upeer shock mounts,visually its all bolted on so it was registered with a quick (30 seconds!!!) inspection at my local dvla

the bike is a virago 535,some say it would be underpowered but i find its quite nippy,will sit at 75-80 no worries.
axle is full width and currently running the 15" alloys you see in the pics,im currently looking for some 14" and fit with a slightly higher profile tire to give a little more bounce at the back as on bumpy roads it can be quite harsh on the kidneys

,all in all it rides quite well,has a little wobble at 35 but once thro that its smooth.