Based on the specs this will not fit as is on the rear rack that got shipped with the Rad Expand bike.

https://www.topeak.com/us/en/products/248-Accessories/1323-OMNI-QUICKTRACK-ADAPTER.

Any suggestions, DIY mods to make this work ..I am not very savy with mods - so would like your input to check if this is worth investing time in and could it work if there are ways to secure it to the wider (170mm) rear rack ?

I looked at the specks and also read as much as I could but I am not able to decipher if the Topeak MTX BEAMRACK (A-TYPE) : https://www.topeak.com/us/en/products/249-MTB-BeamRacks/135-MTX-BEAMRACK-(A-TYPE) will fit a Rad Expand bike - still trying to see if I can make the MTX system work for me for quick rel.

I am not an experienced user of bicycles with gears ..plus have always ridden bicycles on flat terrain in Florida. I have had a Schwinn bike bike in the past with Shimano gear system and the one of RadExpand is micro-shift - so just wanted to hear feedback from experienced users on gear system on RadExpand.

Also if there is a beginners guide on efficiently use gears - please share a link 

RadPower recommends that the bike be tuned up at a professional bike shop after the first 25 miles after self-assembly..is this essential to be done or is there any alternative.
Hard to find bike shops in our area (FL 32771) that are not very busy and are able to have a turn around time of 1 day.

Also what should be covered in the 1st tune up esp. if you visit bike shops that don't normally service rad power bikes.

Anyone share their experience with folding rad bikes after installing the front and rear baskets ? I checked with Rad customer service and they mentioned it would not make a difference but its hard to visualize how the folding will work after installing the baskets ..

Are bike seat bags not supposed to be installed if using a suspension post ?
I tried a few highly rated bags but none was a good fit on this post..the straps were not in the right place to secure the bag. I am using this suspension post along with A Cloud-9 seat on a Rad Expnd 5.