Matrix Switcher

Trying to figure out when each model of Extron was released, looking at some copyrights from the manuals: CrossPoint 300 brochure: 2007 Rev C Crosspoint 300 User Manual 2007 Rev B Mav Plus Brochure 2008 Rev E Mav Brochure 2007 Rev D Matrix 50 Brochure 2002 Rev A Matrix 50 user manual 2004 Rev J Device Type: Matrix Inputs: Aaaa Outputs: aaa Features: 17 models with I/O sizes from 4x4 to 8x8 Notes: Self-feedback Is it capable of self-feedback, if so, describe the signal chain. Links: https://www.extron.com/product/mavvseries https://media.extron.com/public/download/files/brochure/mavseries_ebro_revD.pdf https://media.extron.com/public/download/files/brochure/mav_plus_series_revE.pdf Device Type: Matrix Inputs: Aaaa Outputs: aaa Features: Numbering scheme is like: Input Number x Output Number. I.e. 88 Series is 8 x 8. 2412 series is 24 x 12 Comes in HD models; or maybe only comes in HD models? I.e. Component 720p and 1080i. Notes: Self-feedback Is it capable of self-feedback, if so, describe the signal chain. Links: Specifications — MAV Plus Series MAV Plus Series Device Type: Matrix Inputs: Aaaa Outputs: aaa Features: 8 x 4, 8 x 8, 12 x 4, or 12 x 8 matrix Notes: 50 series seems to indicate that these were shipped in modular format; with more broadcast focus? Self-feedback Is it capable of self-feedback, if so, describe the signal chain. Links: https://media.extron.com/public/download/files/brochure/mavseries_ebro_revD.pdf https://www.extron.com/product/matrix50composite Device Type: Matrix Inputs: Aaaa Outputs: aaa Features: Seems like Crosspoint might mean exclusively RGBHV Matrix Switchers RGBHV 5 BNC Notes: Crosspoint Plus appears to be large scale Self-feedback Is it capable of self-feedback, if so, describe the signal chain. Links: https://media.extron.com/public/download/files/brochure/crosspoint300series_ebroC.pdf https://media.extron.com/public/download/files/userman/XP300_Matrix_B.pdf https://media.extron.com/public/download/files/brochure/crosspointpls128hvajbro.pdf