MX5 shock bearing question

[Numplumb]

Hi I have just measured them in the shock they measure 12.56mm and in the poly bushes they measure 12.3mm, if I reamed out shock ones to 12.7mm for half inch bolts as you suggest I would have to enlarge the mounting bracket holes which would be very awkward especially the top shock mount at the rear, do you think it matters to be that loose in the shock mounts? or should I get new bushes at 12mm.