There is a simple remedy. Identify the spot where the gap shows, take out the following element, probably a chain. Now fold the last tatted element, probably a ring, back over the previous chain. Hold the ring on top of the chain like holding an OreoŽ Cookie sandwich. Position the work and prepare to tat the chain. Set the first half stitch extremely firmly. Repeat with the second half stitch. Now unfold the ring and return both ring and chain to normal tatting position. Look now for any possible gap. Finding none, complete the pattern using this method as needed.
Should you still find a gap below the rings, you may need to rotate the left wrist outwards to remove that last little smidgen of unwanted space. After some practice, it will no longer be necessary for you to stop and fold back the ring and your hand will be able to feel when the last little bit of gap is gone.
The problem = GAPSOSIS
The preferred result = No GAPSOSIS
Examine the work and locate the gap below the first ring.
Step 2 Fold ring two back over the chain.
Step 3 Rotate the work and prepare to chain.
Keep the ring on top of the chain.
Step 4 Tighten each half stitch of the first double stitch of the chain firmly.
Step 5 Unfold ring. Note there is no gap now. Continue pattern.