Magnetic Mount for Lightbar on Commercial Ztrak Mower

I wanted to add a 22" LED lightbar to my Z930M mower that was usable with the ROPS in the down position. I did not want to drill any holes.   These mounts each use 3 36mm x 7mm cup magnets to attach to the front panel of the mower.

The magnets used have a claimed straight pull force of 150lb. each.  They were these:  https://www.amazon.com/dp/B0CC5HMKXP

I bought a 6 piece pack for $9.99.   

The lightbar I bought was this one:  https://www.amazon.com/dp/B071Z63QYB

It was $25.87, which was supposedly a “limited time deal” vs. a regular price of $39.99.   They are still available at the lower price.

Two versions of the magnetic mount design are presented here.  The “V2” mount is intended for a straight bar.  The “V3” mount is intended for use with a curved lightbar like the one I bought.  The “V3” mount requires use of a longer M8 bolt than provided with the lightbar I bought.   It has a cylindrical profile and slotted opening for the bolt.  A 25mm M8 worked fine. Use of a washer is recommended. 

The “V2” mount could use an M8 as provided if the lightbar was straight.

Print with a UV and weather resistant material.   I used ASA.   Print with a large wall and surface count for strength and to provide material for the magnet mounting screws to grip. I used 3.6mm thickness for walls and 1.5mm thickness for top and bottom layers with 25% infill.  

Supports are necessary for the magnet spaces.  Be sure to define enough seperation (interface spacing) in both x/y and z distances to allow for easy removal/cleanout.

Fusion 360 & .STEP files are included

Video of lightbar mounted on mower:   

Warning flasher info &  mounting plates :  https://www.printables.com/model/1383573-led-flasher-mounting-base