Hi there. Fantastic software and community to which I am already very grateful! 

Can the guys here recommend a brand / company for motion control hardware which has very tight and accurate control over the movements necessary for macro e.g. 2:1 closeup. I invested in a brand already (not into naming / shaming) which simply couldn't control or repeat the movements smoothly enough for my needs. The final videos are jittery and with beginnings and ends that are not smooth. I am doing timelapses of flowers which take place over many days and would love to move say from one side to the other e.g. 70-80cm over a period of days. For best results I will need to be able to program the focusing of an old Pentax 67 lens. 

Any recommendations? 

Thanks in advance.

Did you check out the EMotimo Spectrum? Should be perfect for that job.