Got me some new (old) speakers!

Copper speaker cables I would say give a softer sound. Less treble forward. I like it. 

Enjoying the system & without the sub too. 

That's good news about your TDL's generally and I can imagine they will have plenty of low frequency extension. I found the PMC Fact-8's (which also use transmission lines to load the speakers) I borrowed last month were lean on the bass to my tastes) initially but responded well to a series of small (10cm) moves towards the back wall. Maybe that helps with the TDL's but you may already have done this.

That's a very good point about a lot of changes at once Tim. I've done that on a number of occasions and sometimes wondered if any of the specific changes wre a small step backwards. Obvious suggestion but can you temporarily reverse any of the improvements to identify what's changed with each?

BTW I'm pleased you've moved away from silver plated cables. When I did this I found the loss of treble detail seemed odd initially but switching back from plain copper (OFC) to silver-plated copper makes me notice the sparkle or sheen. Not to my personal tastes but probably good in some systems, a large furnished or dead room.

If it ain’t broke n all that. Doh. 

Well, anyway, the TDLs are coming as are new dual runs of copper cables to replace the QED Silver Anniversary bi wire which I’ve never liked and was a beatch to strip & terminate. 

Had to go budget. Couldn’t afford GS cable I’m afraid 😟 

That's great, you have some fine speakers at a good price Tim. If the two speakers sound alike and give you enjoyable stereo sound the job is done!

Despite being a tweaker of my own kit, my advice to others is almost always "if it ain't broke don't fix it." However if you want to delve deeper into driver specs I've written this elsewhere on the forum so apologies for repeating. Provided you can easily remove the drivers without any damage and disconnect the wires from them, you can probably run cables directly from each driver's + and - connectors and out of the enclosure (via a reflex tube or TL opening or using the speaker terminals on the rear panel) to test gear. This has to be done with care but allows a wide range of electrical and mechanical measurements to be made on each driver. Don't do this unless you plan to change something inside. Make sure anything you do is reversible and can be done safely with your skillset and toolkit.