Default Question about updating to 4.4

Hello fellow of xda,

I had spend hours and hours finding solution rooting and manged it myself. I used this then this and write protection, but I was having problems about Telnet stage 1 where do I find it? I have bootstrap twrp installed and backed up stock rom.

Since Bootstrap was installed and if I take ota this will brick device? or have bootstrap removed prior to ota? I'm very very confused here

Can anyone help?