Cutting down an Unger Ergotec Ninja channel

Hi guys, I’m a WFP guy but I’ve a monthly commercial job with almost 200 interior windows the exact same width at 580mm (22.8”)
 

I’m currently straight pulling them with a 14” S Channel but was thinking it would be quicker if I could cut down a longer channel to 22.8” and do one pull rather than my current two.

Would the above 30” channel be suitable for cutting down to the required size or do the end clips mean I can’t do this?

Many thanks and any suggestions welcome 

I know it’s a different size but I have a small liquidator cut down for narrow windows on a internal I used to do worked great pull down once and no details apart from wiping the bottom.