This unit fixes to 4 x points on the deck of your boat - fiberglass or aluminium, to mount independently of any bimini or any structure on your boat. Like the MBG310, it can be cut to size, both width and height.The MBG305 can fold down for trailering or boat storage with the "universal" mounts supplied. This rod holder is 1.9m wide (max). If you want to narrow it to suit your bimini and/or boat, you must cut the horizontal support tubes. This can be done easily with a hand hacksaw. It is best to cut the tubing where rod holder No. 2 and 5 clamp to the tubing. If, say, you want the rod holder to be 100mm narrower, i.e. 1.8m wide, cut 2x50mm sections out - one at the rod holder position 2 and one at 5. It would be ideal if you could get someone to re-weld the tube together. Can be easily done by TIG-Welding. Any panel beater has this equipment. It should not cost even a slab!.