Home made polybush press

Hi all, I've a full polybush replacement job coming up, an in addition to my threaded rods and pullers I was thinking of making this frame out of thick angle iron to use with a trolley jack to persuade some of the big poly bushes with lips on home:



Needless to say I'll be standing well back wearing PPE.

Even if I just get it greased up and under pressure overnight this might do the job.

Any thoughts?

I know I can get a press for £100 odd, but my garage is already full to bursting and I took on this job to keep the cost down, so am looking at as many DIY tips and tricks as possible.

Thanks