cnkiceanswered grow question 4 years ago We have the same strain but mine is an auto version. Since yours is not auto I would suggest you try "super cropping". More details here: https://www.growweedeasy.com/how-to-super-crop-marijuana
You are in week 5 and it is a bit too late to start LST, that's why you feel the resistance from your main cola. In this stage, your plant's stem becomes more “rigid” and it will be harder to bend. When do LST at this stage, you want to be very careful not to apply too much strength otherwise you will hear crispy sounds and see a horizontal cut on stem. This will completely cut off any nutrients, think about bending a straw.
By doing super cropping you are like “splitting” a bundle of straw vertically. It is much safer. Your plant will catch up quickly and form an even stronger node.
I hope it helps, cheers!