You can replace the entire pipes or cut back and extend the existing ones. If you extend, then you'll need to put joins in. Do not use the ones you can pick up from near enough everywhere with the blue plastic ferrules, they will leak. You either need to get the genuine LR ones but they are around a tenner each. I tried some of these (as my partner works at RS Components and gets 20% discount) https://uk.rs-online.com/web/p/pneumatic-straight-tube-to-tube-adaptors/0812106/ on mine where the pipes had been trimmed so many times that they were getting too short. Rated at twice the maximum pressure the EAS works at and not one single leak. A few of those and a couple of metres of 6mm pipe will get you sorted.
Get yourself a valve block rebuild kit (with the black O rings, not the orange ones) and an EAS cable and the free RSW software and you will be sorted as far as EAS is concerned.
Welcome to the forum, it was me that sent you the PM on the other side but I can't use this username over there, it was banned for life! Where in the country are you? There may be someone nearby who can give you a hand.