,,friend,, he is in contact but not big friend. But he is open to discussion about DIY everything on some real actions.
I am checking developing of his product.
You disliked my V3 kart :-( I see.
But for example 3D printers - You can buy completly professionly 3D printer or 3D printer kit. Some people buy kit and some people final product. it depands on people. My way is first as kit. I am not big with my product but I am only playing with this as child. Lot of people like playing. I know your opinion. Welding of frame maybe will be.
Well.. I have a handfull of 3d printers myself.. 2 I made on my own,
2 are of Josef's design (the original Prusa Mendel and a chinese off brand prusa i3)
and the original RepRap Darwin which is more or less just a non functional relic by now. (big a a fridge)
So kits.. I'm familiar with them, 3d printer kits even more than most I'd say
And I agree a good kit is a nice thing.
I'm not against making a kit kart at all.
I'm against adding 12500 bolts when all you need is maybe 50.
I'm against using a bracket and four bolts when the same can be achieved with two 4cm long weld beads which are much more reliable and user friendly in the end.
I don't know how many bolts you have in v3 exactly.. but far too many for sure,
you ship them with the kit?
you need to buy them (wholesale of course.. but still they're rather expensive I assume)
Or you let the customer buy them on their own (which will raise the building costs by at least 200 € per kart for the customer.)
let's stick with the 3d printers since you started that..
Allow me to tell you about the history of 3d printers as I witnessed it:
########
My original Darwin had
60+ printed parts and several hundred nuts and bolts
it was a real pain to assemble big and heavy it's printing quality was *MEH* and all in all apart from some enthusiast like myself.. not many have been in use.
then came the Mendel iteration..
much smaller footprint, much fewer parts by same printsize and
finally rerap slowly took off.
Then Josef came along, took the Mendel removed some more printed parts and a good number of nuts and bolts.
redesigned most for easier assembly and/or shorter print time etc.
and finally printer assembly was doable within less than two hours (Darwin took 8 plus 3 for initial setup)
He made it possible for even untrained "users" to just buy a kit off ebay or so and build, setup and start printing in less than a day of work.
THAT made it fun for almost everyone.
And that was key.. as little partcount as possible (also to decrease printtime.. since back then printing a whole set took days!)
as easy assembly as possible (installing & adjusting the tension of the Z-belt on Darwin alone took an hour easily!)
Few parts.. good parts.. ease of assembly!
That's why Josef is kind of the HERO of the RepRap project (apart from Adrian and nophead and so on of course... different story!)
But without Josefs improvements it wouldn't be possible for me to buy a kit for a friend (as his first printer) and just let him assemble it on his own without worries.
#### 3d printer history over
And the same will hold true for your kart;
that one needs an enthusiast to assemble, someone that's willing to plow through tons of nuts and bolts and washers.
A dad that wants a nice sturdy kart for his kid, sees it and turns around and buys a cheaper assembled kart from china.
just because that not only is visually less appealing (really that car seat is UGLY a certain "NONO" on a go kart!)
it's also intimidating by just the number of bolts.
There is one kart (not exactly a kit.. but can be seen as one)
a georgeous beautiful racing kart...
very simple design four tubes and just a handfull of custom (welded!) parts..
the rest: nuts and bolts!
Black Hawks poison arrow:
https://www.youtube.com/watch?v=56t1EsLTxeY
THAT is great engineering, good design and would make an ideal kit kart.
replicate something like that and you will have troubles fullfilling the orders.
here's it's complete chassis parts:

(sorry it's small ... the only disassembled pic I got I'm afraid)
and yes, it fits in a very small box
yours.. well... I doubt you manage to sell ten kits in total.
So yeah, I know which one Josef would prefere

And me.. I'd love to lay my hands on a blackhawk poison arrow *drool*
'sid