Should I Get Velashape After Liposuction to Make Skin Tighter?

Thank you for your question. Without pictures, it is difficult to give an accurate assessment of the type of treatment you need. However, a tummy tuck is generally used to treat skin laxity in the stomach and to reduce excess fat. 

I do utilize VelaShape for many of my patients following liposuction. It does help with skin tightening for those with mild laxity; however, we combine it with ReFirme laser treatments as well to get enhanced results. I do think it is important to not 'oversell' these modalities as they will not replace appropriate surgical treatments such as a tummy tuck in the patient who has excessive laxity.

It is interesting to me, as a surgeon, that you have undergone treatment with two DIFFERENT modalities that each claim to "tighten" the skin more than traditional liposuction techniques.
Most patients undergo one or the other but rarely both.
I would not be overly optimistic about the benefits of Velasmooth. However, this does use a completely different technology. It may produce a mild or slight improvement but, in my opinion, it is unlikely to correct truly lax skin.

Vaser = ultrasound
Smart Lipo = laser
Velasmooth = radiofrequency

You may want to try this out on a localized area but as you most likely have been aware, this will require multiple sessions.
I hope this helps!