Hi eckcan replying. I also have a eriba 430 with an omnister 2000. I had a look for instructions, but not very satisfactory. what I suggest is you go on you tube look up how to install an safari room, it makes it look very easy.After I bought mine I and the wife shortened the sides, and it fits well now. I also shortened the rear posts to make it fit better. Any problems you can email me and I will speak to you on the phone if needed. It is better to fit front first, then you can see whether you need or want to do any alterations.bye for now.