Apply suggestions from code review

Co-authored-by: Elliot First <elliot.first@gmail.com>
Co-authored-by: Garry Bowlin <171296429+gbowlin@users.noreply.github.com>

docs/user_guide/index.rst

@@ -506,7 +506,7 @@ the model's name and any configured thresholds. It is typically defined in a
 Modifying the Analysis Data
 ---------------------------
 
-When possible it can be better to modify the data during extraction and have predictions and events files contain everything that is needed for analysis.
+When possible it is better to supplement the data upstream from seismometer such as during data extraction and have predictions and events files contain everything that is needed for analysis.
 However, there will inevitably be times when this is not possible but you still want transformations to be done prior to most of the notebook running.
 
 In this situation, you should modify the first cell of your notebook to run a custom startup method instead of ``run_startup``.
@@ -519,7 +519,7 @@ Then, follow the pattern of normal startup but specify your function in the :py:
    from seismometer.configuration import ConfigProvider
    from seismometer.data.loader import loader_factory
    from seismometer.seismogram import Seismogram
-
+   import seismometer._api as sm
    def my_startup(config_path="."):
       config = ConfigProvider(config_path)
       loader = loader_factory(config, post_load_fn=custom_post_load_fn)