Hi SimRice,
We are getting into unknown territory here, if the machine didn't have one fitted originally, it could be detrimental to fit one to your machine...(the design may have compensated for that weight integrally).
As I say, it is all very mysterious and unknown..but if in doubt, my advice is don't fit it..."If it aint broke, don't mess with it" lol
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin