ok... I was able to spend some time today on my tyre carrier.
Started off by test fitting the latch. After a few different configurations, and mainly due to the size of the latch, I had to settle with a horizontal config.

Then I drilled some holes in some square plate:
And then cut off some excess corners (yeah I know it's different from my original sliding design but i figured that I could just make an extension onto it if I needed):
Added some bracing - gusset plate style:
Tacked up and test fitting yet again:



Here it is all welded up:


And now with the tyre on



ok, the plan for tomorrow is:
1. finish welding the ends for the square tubing
2. weld support for latch.
3. weld latch and locking plate.
4. remove plastic bumper and weld more bracing for the spindle.
5. Clean and prime!!!
As per number 4, when test fitting with the tyre, I noticed some movement when applying pressure horizontally on the tyre. Could be the spindle or could be the fact that the locking mechanism was not finished and not latched, however just to be sure I will be removing the plastic bumper and adding more bracing to the angle and the spindle.
Stay tuned