Cr10s5 with v4.2.7

thanks for providing this site it is a lot of help keeping my printer obsession on track and very much appreciated.

i have a got my hands on a cr10s5 the one with a huge bed and it has a v4.2.7 main board with bltouch and would like to know if i can use any firmware builder options, to make something for it.
What would you kindly suggest as the best options for the machine.

thanks for your time