Isolating Transmission Line speakers from floor

Unfortunately the only way to post images is on your system page. https://systems.audiogon.com/systems/8367  You are right, Townshend Podiums only raise the speaker very little, less than some spikes even. Mine are for Moabs, about 150lbs, they can make them for just about any size/weight.   https://www.audiogon.com/listings/lisa8e18-townshend-audio-seismic-isolation-podiums-size-4-570mm-43...

Being on springs the load should be balanced, which for most speakers the drivers being on the front brings the center of gravity forward, which you balance by having the speakers a little further towards the back. Your transmission line may have enough baffles inside that this is less of a shift. Not a big deal, they can also be adjusted level, just something to keep in mind.  

John Hannant helped me with mine, gave him the speaker weight and measurements, the result you can see, looks like they were made for em. 

It is possible that spikes reduce energy transfer (extremely small contact point) but more likely they allow better coupling (especially on the carpet) to the floor.  As long as floor has lower resonance point than 20Hz it will reduce speaker vibration (added mass).  I use spikes, but in apartment building I would definitely use vibrapods.

My Transmission Line's sit directly on the floor, they dont accept or have spikes. 
Cheers Andrew

Spikes will definitely increase coupling. Townshends or feet like Isoacoustics Gaia will decouple.

I use Isoacoustics Gaia feet with mine and swear by them.

I used Gaia's on a set of Tannoy XT8F's, great result. Even the "Minister of Finance" was impressed...