The trickflow springs are very easy to install. Taking them off was a little difficult the first time I did it. I used different compressors for each valve. For the one with the 2 piece retainer that holds the keeper, I used the big clamp looking one that has the pointer pushing the valve. I used that one to bring down the big retainer, and I used a 15mm socket and a hammer to drop the smaller retainer. And for the one with the single retainer holding the kepper, I used the over head twist type compressor, and once you have the spring compressed as much as you can, you hold the bottom of the valve with your hand and hit the top of the compressor with a hammer and itll break it loose. You will probably need a magnet for this one. If using new spring kit you probably wont need any of this but i still labled all valve, springs, and retainers, to keep them together.
Installing them is even easier, the tfs kit comes with everything you need to install the new springs, even has a spring height tool. I assembled a complete head in like 15 minutes.
