Hi I want to purchase an alarm system TODAY from you and have a list of items I would like to confirm that they are all compatible etc. The items are as follows:- Texecom VERITAS R8 / Bosch Blue Line ISM-BLP1-P Pet Friendly Blueline PIR Detector X3 / Pyronix Deltabell E External Sounder c.w cover / Pyronix Twin Alert Internal Sounder. Also can I Also use:- ESP Fireline Combined Smoke and Heat Detectors and Base x2 (one for 1 st floor and one for ground floor near kitchen!) I already have the cable and spur but have I missed out anything? Thank you for your assistance