The Allett QC2UC Conversion Kit is an essential accessory for owners upgrading to the latest Stirling cylinder mower. This kit enables you to convert your existing QC (Quick Change) cartridges from Allett Kensington, Classic, or Liberty mowers of the same width, making them compatible with the new Stirling 43 and Stirling 51 models.
It is important to note that while this kit allows the use of QC cartridges in a Stirling machine, it does not replicate the full-depth cultivation advantages of the purpose-built UC (Ultra-Change) cartridge system. While slightly deeper cultivations are possible compared to the older machines, operators must be cautious with depth selection. Setting the cartridge too low can lead to ‘scuffing’ or damage to the turf.
(The Ultra-Change cartridge system is subject to International Patent Application WO 2023/079275).
Expert Advice from an Authorised UK Dealer
As an authorised UK dealer for Allett, Sims Garden Machinery provides genuine parts and accessories. For advice on compatibility or fitting, our trained sales staff are always available to help at our Stratford-upon-Avon showroom or over the phone. Our workshop, staffed by experienced mechanics, can also assist with any servicing or fitting needs for your Allett mower and its versatile range of cartridges.
Our team is here to help. Contact us today for expert advice.
Why buy from Sims Garden Machinery?
Authorised main dealer
We are authorised dealers for leading brands, meaning genuine parts, manufacturer-approved training, and warranty support you can rely on.
Real people, real support
No call centres. No ticket systems. Just a knowledgeable local team you can speak to when you need help.
Expert advice — not pushy sales
Our team are trained mechanics and product specialists, so you get honest, practical advice based on how you’ll actually use the machine.
Established, independent family business
We’re a long-standing independent dealer with deep roots in the local area — built on reputation, repeat customers, and word of mouth.







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