Add assembly instructions

[danyhm]

Hello,

Thank you very much for your work.
Please add assembly instructions like the original author.

Another problem with Dengler design was that it did not use common aluminium parts for the non-3D parts.
for example the aluminum plate he used had holes in them which needed precise tooling.
if you could remove that or replace it with 3d printed part that'd be great.

also not every site has all the needed parts in one place. if you could add for example JLCMC part numbers for each aluminum part that'd be great.