SpiderBasic

I don't know if it's a limitation or my lack of experience.

I don't know how to use more or les tan 3 cols by row
I don't know how to give different width to a gadget (i.e: a button)

So my question is: Is MobileUI very limited to edit the UI as I want?
Is it better to fight with Javasscript?

Mobile UI is based on Onsen UI which is specifically designed for phone, so yes it's very limited layout speaking (but it should be more than enough for UI for phones).

So... we can use all of the OnsenUI functionality on SpiderBasic, How?
i.e: We can replicate this layout (of the OnsenUI website)?:

Not all is wrapped, but most of what is displayed on your screenshot, yes. The full OnsenUI lib is included,so you should be able to use any component with inline JS.

On the OnsenUI web I can see how to make a largue button: <ons-button modifier="large">large</ons-button> but I don't know how to do the same in SpiderBasic.
EDIT:
I found a solution: viewtopic.php?t=2670