Hi all and happy new year to you!

I have just upgraded BIAB to the 1214 version and decided to mess about with a Beatles: Here Comes The Sun.

Now, I am not musically trained and learn the hard way, I have little knowledge about music theory and play "by ear"

I believe that there is a time signature change where the lead guitar starts... I have tried to change it from the primary 4/4 to 3/4 on the applicable bars but it does not sound at all good. I would like for the guitar to strum once, for the duration of each bar...

Here is a youtube video of the song, the bit that I would like to deal with starts at about 00:52.The Beatles- Here Comes The Sun

This would be my first time trying to creating a backing track.

Any suggestion on styles and signatures is welcome.
Thanks,
Franco