lowglow, can you suggest where I can order the Samtec connectors?
For the low profile sockets, I found single row, 40 holes, SLW-140-01-T-S and 5 x 2 row (D) SLW-105-01-T-D at element14.
I used the configurator at Samtec for the MTSW (
https://www.samtec.com/products/mtsw) straight headers, single row. I think these would be difficult to find at element14, Mouser etc. in the specific pin length you mentioned "170". (MTSW-1**-07-F-S-170) Mouser has thousands of MTSW types in stock but as far as I know none of this length or close to it, though as far as I know, there's no automated way of searching for this. With the configurator, I selected MTSW-150-07-F-S-170 and added 3 to my shopping cart Samtec. Likewise for the 5 x 2 internal pin strip, with the bent ends for SMD, I ordered 6x TSM-105-01-F-DV.
However, I haven't placed the order because the unknown and likely high expense of shipping to Australia, I guess from the USA. It seems from the order summary that they might ship each set of items separately, with UPS Express or some other method, all of which I guess would make more sense for $100+ orders, than for this little $6.62 order.