am i gona run outa room

ive got 6 plants that are bushy indicas. they range from 32 to 40 cm now.
i grow in a 1.2m by 1.2m by 2m grow tent.

• when should i switch them to budding?
• am i goning to have a lack of room?

I would say your absolutely fine for height but with the plants bushing out your going to have a tight squeeze around the sides, should be fine with a bit of training tie up some branches. Like low level LST (Low stress training). LST is something to learn when growing in restricted spaces.

Keep in mind when flowering the plant can more than double is size.

they say they double to triple in size so give it 3 times their size now to be safe. i dont know measurements in cm so cant figure it out for you lol

looks like you got some good advice ..... I expect you'll be good for height but already said, it might git a lil crowded. You could do pruning or trimming and "shaping" each plant a little if you choose ... the benefit is you might see better development deeper into the canopy ... but there are lots of arguments and debates on trimming ..... if you can we alsways like to see pictures .... walk on!!~~~~

its supose2 be g13. but can never trust what some people say. they are bushy and i think im going to have space issues.
i haven't seen any srog or lst training before. does any1 know of any good research sites or videos i can watch.

lots of guides here but its pretty basic you just tie down the branches and make them grow where you want