Great Video on a LLMini build

A very nice find Gizmo. Well done to share this gem.

It shows how pretty much anyone can put a "lake Lefroy mini" together with a few adaptations and a bit of assistance.

This video also demonstrates why all the components should be only be tack welded together till your happy with the setup before fully welding.
I find this is the hardest thing to teach my workshop students.
"Without fail" they always fully weld things up and cry to me when they have to cut it all apart to correct something that doesn't line up, the weld has pulled it out of alignment, or a necessary component/attachment point has not been installed/fitted first.

This is just my 2 bobs worth.

When building my "Mini's" I always start with the mast step to chassis welding , as this intersection distorts the spine a lot (even in a jig or G-clamped to a solid structure and preheated).
The mast step is the only component I fully weld during my initial assembly. Also remember to fit the mast step "flat bar reinforcing strap" under the chassis while its all still hot to minimise distortion.

I then align the front end steering head to the mast step. The mast step being clamped vertically by a big set square to my bench.
With a long steering shaft sticking out the top and bottom of the front end for reference, the tacked on front end is simple enough to get aligned. (With the chassis spine chocked up at the right ride height, just tack weld the steering head at the top and then simply twist the shaft till the steering head aligns perfectly with the mast step when viewed from the front. It is amazing how accurate our "eye-ometers" are for this job.)
When it's aligned, tack weld the bottom and then tack each side to nail it firmly in place.

When the chassis ride height/ground clearance is sorted out (with the correct trail on the front wheel) the rear axle can then be tacked into place with the mast step (still vertical on the spirit level). The 12mm diagonal supports will also stop the rear axle pulling out of alignment.

I also find when fully welding the rear axle later on, it will allow the spine to slump down to 10mm less ground clearance or so, as the welds cool and shrink. I just wedge it up 10mm higher for a start to allow for this. This 10mm seems to work out the same on all the minis I've built.

Now when your finally happy with how it all looks, then spend 20 mins on the welder, doing everything evenly, (If you weld across the axle on one side, do the other side straight away so it distorts it as evenly as possible) and fully weld the whole chassis together.

Cheers.