I still wonder why
A. talk about any default ship / module TRANSFER
if the mankind in future utilize mostly 3D printing for ships
then there shall be short delay for the construction itself and transfer from nearest station capable to do it
the old ship is sold/reconstructed and the difference is paid by the ship owner
aka NO instant default ship / module transfer in this case but very fast depending on distance to the nearest capable station
B. talk about engineer modified module /ship etc. TRANSFER
it was clearly said that tuning what engineers do are special and not possible to replicate
thus, it shall not be possible to 'recreate those via 3D printing'
as if it was, the whole point of engineers is null and each 'special' tweak would be needed once then cloned as blueprint
aka NO modified ship / module instant transfer possible, it must be done by the old school way of full transit
in such case, calculate jump time , refuel time and make the delay accordingly
owner of the ship must pay the 'transporting NPC/corporation' for the services (way more than in case A.)
outcome , there shall be always some delay and cost
if you want immersion you actually add those NPC as semi-persistent AI travelling from A to B
some transfer time == possible to enrich gameplay in future (e.g. AI NPC semi persistent , convoys, escorts w/e use your imagination, module cargo protect)
instant transfer time = forget all above